Every reference with a known width takes the same strap size. Your reference is engraved on the case back or between the lugs at 6 o'clock.
20 mm
Verification: Listed by the maker for ref. 1521BLUEBL.SQ20S, 1521PROFD.SQ20B and 10 more
Attachment: spring bars
41 to 42 mm cases
Official page: Squale
Report an errorIndicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
The Squale 1521 takes a 20 mm strap: all 42 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure.
Squale 1521 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.
1521 Black Blasted Leather
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmMatte black dialCase material: 316L Stainless Steel
1521 Black DLC (rubber strap, pin buckle)
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Black DLC coated 316L stainless steel
1521 Blue Blasted
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmMatte blue dialCase material: 316L Stainless Steel
1521 Blue Blasted Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlue dialCase material: 316 L Steel
1521 Blue Ray Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmSmoky Blue dialCase material: 316 L Steel
1521 Classic Bracelet
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 Classic Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack dialCase material: 316 L Steel
1521 Classic Leather
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: 316L Stainless Steel
1521 DLC Full Orange
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmOrange dialCase material: 316L Stainless Steel
1521 Full Luminous Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmSuperLuminova dialCase material: 316 L Steel
1521 Full Luminous Militaire Bracelet
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 Full Luminous Militaire Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmWhite Superluminova dialCase material: 316 L Steel
1521 Fumoso Bracelet - Special Edition
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 Green Ray Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmSmoky Green dialCase material: 316 L Steel
1521 Marina Militare (microfiber strap)
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack, BROSSè FINISH dialCase material: 316 L Steel
1521 Militaire
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: 316L Stainless Steel
1521 Militaire Blasted
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: 316L Stainless Steel
1521 Militaire Blasted Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack dialCase material: 316 L Steel
1521 Militaire Bracelet
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 Militaire Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack dialCase material: 316 L Steel
1521 Ocean Bracelet
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 Ocean Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmSunray Blue dialCase material: 316 L Steel
1521 Ocean Leather
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmSunburst blue dialCase material: 316L Stainless Steel
1521 PVD
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: 316L Stainless Steel
1521 PVD Leather
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: 316L Stainless Steel
1521 Sole Cascante - Gnomon Exclusive
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmCobalt blue. Cascading sunburst dialCase material: 316L Stainless Steel
1521 50 Atmos 1521 Black Blasted Bracelet
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack dialCase material: 316 L Steel
1521 50 Atmos Black 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Stainless steel
1521 50 Atmos Black Blasted 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Stainless steel
1521 50 Atmos Blue 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlue dialCase material: Stainless steel
1521 50 Atmos Blue Blasted 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlue dialCase material: Stainless steel
1521 50 Atmos Blue Ray 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlue dialCase material: Stainless steel
1521 50 Atmos Blue Ray 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlue dialCase material: Stainless steel
1521 50 Atmos COSC 1521
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 42 mmBlack dialCase material: 316 L Steel
1521 50 Atmos Full Lume 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring bars1521 50 Atmos Full Lume 1521-026/A
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmYellow (lume dial)Case material: Stainless steel
1521 50 Atmos Green 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmGreen dialCase material: Stainless steel
1521 50 Atmos Green 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmGreen dialCase material: Stainless steel
1521 50 Atmos Militaire Black 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Stainless steel
1521 50 Atmos Militaire Black Blasted 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Stainless steel
1521 50 Atmos PVD 1521-026 PVD
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dialCase material: Stainless steel
1521 50 Atmos White Lume Militaire 1521
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmWhite (lume dial)Case material: Stainless steel
No reference matches.
The Squale 1521 takes a 20 mm strap: all 42 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure. The Squale 1521 ref. 1521BLUEBL.SQ20S, 1521PROFD.SQ20B and 10 more take 20 mm (listed by the maker).
From our database, which lists 42 Squale 1521 references, 42 of them with a listed width. Each reference card says whether the maker lists the width, two independent sources agree on it, or it is not yet verified.
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.
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.