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Breguet Classique

Widths differ across this line. Enter or pick your exact reference to get its width.

20 to 22 mm

Verification: Listed by the maker for ref. 5177BR/29/9V6

Attachment: spring bars or to verify, depending on the reference

38 to 42 mm cases

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Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.

Watch line117 references
20 mm
Illustration drawn to scale: 38 mm case, 20 mm lugs

The story · Since 1823

The story of the Breguet Classique

A Classique is built from codes Abraham-Louis Breguet set in his Paris workshop, opened in 1775: fluted coin-edge case, engine-turned dial, blued pomme hands. In 2025, 250 years on, the Classique Souscription 2025 took the top prize at the GPHG.

36 mm

case diameter of the Roth-era refs. 3050, 3310 and 3350

Worn by

Brian Cox

Read the full storyHide the story
36 mmcase diameter of the Roth-era refs. 3050, 3310 and 3350
72,000 vphbeat rate of the Classique 7225's calibre 74SC

Chapters

  1. 1775 to 1823

    Codes from the Quai de l'Horloge

    Abraham-Louis Breguet opened his own workshop on the Ile de la Cite in Paris in 1775 and worked until his death in 1823. The modern Classique draws on the codes he and his successors set: fluted coin-edge cases, engine-turned dials and blued pomme hands.

  2. 1983

    Five codes on record

    In 1983 Europa Star listed the five codes of the Breguet style: fluted cases, delicately rounded horns, hand-guilloche dials with a signature window, apple hands and the pin buckle. Europa Star later noted that the 2019 Classique 9068 still followed them.

  3. 1987 to 1999

    Tourbillon, Investcorp, Swatch Group

    In 1988 Breguet launched the 36 mm ref. 3350, its first wristwatch tourbillon, developed under Roth. Investcorp took over the company after the Chaumet brothers' bankruptcy, and Roth left to go independent. In 1999 Breguet joined the Swatch Group under Nicolas G. Hayek.

  4. 2006 to 2016

    Silicon, then grand feu enamel

    Breguet adopted silicon balance springs in 2006. By April 2016 a new 40 mm by 6.10 mm Classique, ref. 7147, with an offset small seconds, was in reviewers' hands.

  5. 2025

    Two hundred and fifty years

    For the 250th anniversary Breguet released the Classique Souscription 2025, a one-hand watch based on a late 18th-century pocket watch, which won the GPHG Aiguille d'Or. In October came the 41 mm Classique 7225, beating at 10 Hz on a magnetically pivoted balance, and the 39 mm 7235 with curved lugs borrowed from the Souscription.

Worn by

Brian CoxScreen

Film role, not personal ownership: as media patriarch Logan Roy in HBO's Succession he has been seen wearing a Breguet Classique, reference not identified.

Moments

2025. On 13 November 2025, the one-hand Classique Souscription 2025 won the GPHG Aiguille d'Or. The jury said it embodied one of watchmaking's greatest challenges: simplicity.

Screen: in HBO's Succession, Brian Cox's Logan Roy wears a Breguet Classique, a character choice noted by The Hollywood Reporter and Mr Porter.

Designed by

Louis-Maurice Cailletco-designer

The prototypist worked alongside Roth on early Roth-era Classiques, among them the ref. 3130 power reserve and moon phase.

Awards

  1. 2025
    Grand Prix d'Horlogerie de Geneve · Aiguille d'Or Grand Prix

    The one-hand Classique Souscription 2025 won best in show in Breguet's 250th anniversary year.

Generations and strap changes

  1. 2025
    Classique Souscription 2025

    A single blued hand on a grand feu enamel dial, inspired by the Souscription watch of the late 18th century; GPHG Aiguille d'Or 2025.

    Ref. 2025BH/28/9W6 listed by Delugs at 40 mm with 21 mm lugs.

  2. 2025
    Classique 7225 and 7235

    The 7225 regulator runs at 10 Hz with a magnetically pivoted balance staff and about 60 hours of reserve; the 7235 moon phase is limited to 250 pieces.

    7225 is 41 mm, 7235 is 39 mm; the 7235 switches to curved lugs, unlike the straight lugs of earlier Classiques.

  3. 1990
    Ref. 3137 power reserve and moon

    The 36 mm ref. 3130, inspired by Breguet's No. 5, gained a display back around 1990 as ref. 3137; it was later succeeded by the slightly larger ref. 7137.

    The 7137 successor is listed by Delugs at 39 mm with 20 mm lugs.

  4. 1988
    Ref. 3350 Tourbillon

    Breguet's first wristwatch tourbillon, on a Lemania-based calibre 558, with three blued seconds hands sweeping a 20-second scale.

    Case 36 mm.

  5. 1976
    Ref. 3050 perpetual calendar

    Roth's first major release reworked a Breguet pocket watch perpetual calendar as an automatic wristwatch; the later ref. 3057 added a display back.

    Case 36 mm in diameter and 8 mm thin.

117 Breguet Classique references

Breguet Classique references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.

  • 2025BH/28/9W6

    Classique 2025

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5140BB/12/9W6

    Classique 5140 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5140BB/29/9W6

    Classique 5140 White Gold / White Enamel

    Lug width: Screwed bars

    Source: Not yet verified

  • 5140BA/12/9W6

    Classique 5140 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5140BA/29/9W6

    Classique 5140 Yellow Gold / White Enamel

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BA/12/9V6

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BA/15/9V6

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BA/29/9V6

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/2N/9V602

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/15/RV0

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/29/9V6

    Classique 5177

    Lug width: 20 mm

    Source: Maker Attachment: To verify

    Grey dial

  • 5177PT/2N/9V601

    Classique 5177

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BB/2Y/9V6

    Classique 5177 Blue Enamel

    Lug width: 20 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 38 mmBlue Enamel dialCase material: White Gold

    Attachment
    classic lugs
    Style
    dress
    Movement
    Automatic
    Caseback
    Display back
    Production
    2018, present
    Status
    Listed in our database, not yet verified
  • 5177BR/12/RV0

    Classique 5177 Rose Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/12/9V6

    Classique 5177 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/29/RV0

    Classique 5177 Rose Gold / White Enamel / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BR/15/9V6

    Classique 5177 Silver Roman

    Lug width: 20 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 38 mmSilver Guilloché dialCase material: Rose Gold

    Attachment
    classic lugs
    Style
    dress
    Movement
    Automatic
    Caseback
    Display back
    Production
    2014, present
    Status
    Listed in our database, not yet verified
  • 5177BB/12/BV0

    Classique 5177 White Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BB/12/9V6

    Classique 5177 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BB/15/9V6

    Classique 5177 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BB/29/BV0

    Classique 5177 White Gold / White Enamel / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BA/12/AV0

    Classique 5177 Yellow Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5177BA/29/AV0

    Classique 5177 Yellow Gold / White Enamel / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5178BR/29/9V6/D000

    Classique 5178 Rose Gold / White Enamel

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 5178BB/29/9V6/D000

    Classique 5178 White Gold / White Enamel

    Lug width: Screwed bars

    Source: Not yet verified

  • 5277BR/12/9V6

    Classique 5277 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5277BB/12/9V6

    Classique 5277 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5287BR/92/9ZU

    Classique 5287 Rose Gold / Black

    Lug width: Screwed bars

    Source: Not yet verified

  • 5287BB/92/9ZU

    Classique 5287 White Gold / Black

    Lug width: Screwed bars

    Source: Not yet verified

  • 5327BR/1E/RV0

    Classique 5327 Rose Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5327BR/1E/9V6

    Classique 5327 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5327BB/1E/BV0

    Classique 5327 White Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5327BB/1E/9V6

    Classique 5327 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5930BB/12/986

    Classique 5930 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5930BA/12/986

    Classique 5930 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7137BB/11/BV0

    Classique 7137 White Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 7137BA/11/AV0

    Classique 7137 Yellow Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 7137BA/11/9V6

    Classique 7137 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7145BR/15/9WU 06

    Classique

    Lug width: 21 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 40 mmGreen dial

    Attachment
    classic lugs
    Status
    Listed in our database, not yet verified
  • 7147BB/12/9WU

    Classique 7147

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7147BR/29/9WU

    Classique 7147

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 7147BB/29/9WU

    Classique 7147 Enamel

    Lug width: 21 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 40 mmWhite Enamel dialCase material: White Gold

    Attachment
    classic lugs
    Style
    dress
    Movement
    Automatic
    Caseback
    Display back
    Production
    2016, present
    Status
    Listed in our database, not yet verified
  • 7147BR/12/9WU

    Classique 7147 Guilloché

    Lug width: 21 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 40 mmSilver Guilloché dialCase material: Rose Gold

    Attachment
    classic lugs
    Style
    dress
    Movement
    Automatic
    Caseback
    Display back
    Production
    2016, present
    Status
    Listed in our database, not yet verified
  • 7225BH/0H/9V6

    Classique 7225

    Lug width: Screwed bars

    Source: Not yet verified

  • 7235BH/0H/9V6

    Classique 7235

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BR/1E/RV0

    Classique 7337 Rose Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BR/15/9VU

    Classique 7337 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BB/Y5/9VU

    Classique 7337 White Gold / Blue

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

  • 7337BB/1E/BV0

    Classique 7337 White Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BB/1E/9V6

    Classique 7337 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BB/12/9VU

    Classique 7337 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7337BA/1E/AV0

    Classique 7337 Yellow Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BA/1E/9V6

    Classique 7337 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7637EB/10/9ZU

    Classique

    Lug width: 22 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 42 mmGrey dial

    Attachment
    classic lugs
    Status
    Listed in our database, not yet verified
  • 7787BR/29/9V6

    Classique 7787 Moonphase Rose Gold / Grand Feu Enamel

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 7787BB/29/9V6

    Classique 7787 Moonphase White Gold / Grand Feu Enamel

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 7787BB/12/9V6

    Classique 7787 Moonphase White Gold

    Lug width: Screwed bars

    Source: Not yet verified

  • 7787PT/2N/9VU

    Classique

    Lug width: 20 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 39 mmBlack dial

    Attachment
    classic lugs
    Status
    Listed in our database, not yet verified
  • 7788BR/29/9V6/DD00

    Classique 7788 Moonphase Rose Gold / Grand Feu Enamel

    Lug width: Screwed bars

    Source: Not yet verified

  • 8067BB/52/BC0

    Classique 8067 White Gold / MOP / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 8067BB/52/964

    Classique 8067 White Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 8067BA/52/AC0

    Classique 8067 Yellow Gold / MOP / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 8067BA/52/964

    Classique 8067 Yellow Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 8068BR/59/764/DD00

    Classique 8068 Rose Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 8068BB/52/BC0/DD00

    Classique 8068 White Gold / MOP / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 8068BB/52/964/DD00

    Classique 8068 White Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 8068BA/52/AC0/DD00

    Classique 8068 Yellow Gold / MOP / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 8068BA/52/964/DD00

    Classique 8068 Yellow Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 8787BR/29/986

    Classique 8787 Moonphase Rose Gold / Grand Feu Enamel

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 8788BR/29/986/DD00

    Classique 8788 Moonphase Rose Gold / Grand Feu Enamel

    Lug width: Screwed bars

    Source: Not yet verified

  • 8788BR/12/986/DD00

    Classique 8788 Moonphase Rose Gold

    Lug width: Screwed bars

    Source: Not yet verified

  • 8788BB/12/986/DD00

    Classique 8788 Moonphase White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 9065BR/5T/976/DD00

    Classique 9065 Rose Gold - Diamond / Black MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9067BR/12/976

    Classique 9067 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 9067BB/12/976

    Classique 9067 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 9068BR/52/976/DD00

    Classique 9068 Rose Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9068BR/12/976/DD00

    Classique 9068 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 9068BB/52/976/DD00

    Classique 9068 White Gold / MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9068BB/12/976/DD00

    Classique 9068 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7337BR/12/9VU

    Classique Calendrier 7337

    Lug width: Screwed bars

    Source: Not yet verified

    White dial

  • 5238BB/10/9V6 DD00

    Classique Chronographe 5238 (Skeletonised/Openwork Dial)

    Lug width: 20 mm

    Source: Not yet verified Attachment: Spring bars

    Case size: 40.3 mm

    Attachment
    classic lugs
    Status
    Listed in our database, not yet verified
  • 7727BR/12/9WU

    Classique Chronométrie 7727 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7727BB/12/9WU

    Classique Chronométrie 7727 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 3795BR/1E/9WU

    Classique Complications 3795

    Lug width: Screwed bars

    Source: Not yet verified

    Skeletonised/Openwork dial

  • 8068BB/59/764 DD00

    Classique Dame 8068

    Lug width: Screwed bars

    Source: Not yet verified

  • 9087BR/29/964

    Classique Dame 9087 Rose Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

  • 9087BR/52/964

    Classique Dame 9087 Rose Gold / White MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9087BB/29/964

    Classique Dame 9087 White Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

  • 9087BB/52/BC0

    Classique Dame 9087 White Gold / White MOP / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 9087BB/52/964

    Classique Dame 9087 White Gold / White MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9088BR/29/964/DD0D

    Classique Dame 9088 Rose Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

  • 9088BR/52/964/DD0D

    Classique Dame 9088 Rose Gold / White MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 9088BB/29/BC0/DD00

    Classique Dame 9088 White Gold / White / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 9088BB/29/964/DD0D

    Classique Dame 9088 White Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

  • 9088BB/52/964/DD0D

    Classique Dame 9088 White Gold / White MOP

    Lug width: Screwed bars

    Source: Not yet verified

  • 5717PT/US/9ZU

    Classique Hora Mundi 5717 Platinum / America

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5717PT/AS/9ZU

    Classique Hora Mundi 5717 Platinum / Asia - Oceania

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

  • 5717PT/EU/9ZU

    Classique Hora Mundi 5717 Platinum / Europe - Africa

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

  • 5717BR/US/9ZU

    Classique Hora Mundi 5717 Rose Gold / America

    Lug width: Screwed bars

    Source: Not yet verified

  • 5717BR/AS/9ZU

    Classique Hora Mundi 5717 Rose Gold / Asia - Oceania

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

  • 5717BR/EU/9ZU

    Classique Hora Mundi 5717 Rose Gold / Europe - Africa

    Lug width: Screwed bars

    Source: Not yet verified

  • 5719PT/US/9ZV/DD0D

    Classique Hora Mundi 5719 Platinum / America

    Lug width: Screwed bars

    Source: Not yet verified

  • 5719PT/AS/9ZV/DD0D

    Classique Hora Mundi 5719 Platinum / Asia - Oceania

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

  • 5719PT/EU/9ZV/DD0D

    Classique Hora Mundi 5719 Platinum / Europe - Africa

    Lug width: Screwed bars

    Source: Not yet verified

  • 5727BR/12/9ZU

    Classique Hora Mundi 5727 Rose Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

  • 5727BB/12/9ZU

    Classique Hora Mundi 5727 White Gold / White

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7800BR/AA/9YV

    Classique La Musicale 7800 Rose Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7800BB/11/9YV

    Classique La Musicale 7800 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 7800BA/11/9YV

    Classique La Musicale 7800 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 5707BB/12/BV0

    Classique Le Réveil du Tsar 5707 White Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5707BB/12/9V6

    Classique Le Réveil du Tsar 5707 White Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

  • 5707BA/12/AV0

    Classique Le Réveil du Tsar 5707 Yellow Gold / Silver / Bracelet

    Lug width: Screwed bars

    Source: Not yet verified

  • 5707BA/12/9V6

    Classique Le Réveil du Tsar 5707 Yellow Gold / Silver

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7137BR/15/9VU

    Classique Phase de Lune 7137

    Lug width: Screwed bars

    Source: Not yet verified

    Grey dial

  • 7365BH/2Y/986

    Classique Repetition Minutes 7365

    Lug width: Screwed bars

    Source: Not yet verified

  • 7637BR/2N/9ZU

    Classique Repetition Minutes 7637

    Lug width: Screwed bars

    Source: Not yet verified

    Black dial

  • 7255BH/2Y/9VU

    Classique Tourbillon Sideral 7255

    Lug width: Screwed bars

    Source: Not yet verified

    Blue/Navy dial

FAQ

What lug width does the Breguet Classique use?

Breguet Classique references use 20 mm or 21 mm or 22 mm depending on the reference and case size, so check yours in the list below. The most common is 20 mm (5 of 9 references with a known width). The Breguet Classique ref. 5177BR/29/9V6 takes 20 mm (listed by the maker).

Do all Breguet Classique references take the same strap?

No. 3 different lug widths appear across the line, often by case size or generation. Check the reference engraved on the case back or between the lugs.

Which buckle goes with a Classique strap?

The pin buckle has been one of the five Breguet style codes since at least 1983, and the 2019 Classique 9068 kept it. The 7147 reviewed in 2016 came on a Breguet folding clasp.

Other Breguet collections

Help

What is lug width?

The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

Measure it in 30 seconds

  1. Take the strap off, or look at the back of it: many straps print their width.
  2. Measure the inside gap between the lugs with a caliper or a millimetre ruler.
  3. Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

Strap, quick release or system?

Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.