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
42.5 mm case · 2026
Official page: Doxa
Report an errorIndicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
The Doxa SUB 300 Ti5 takes a 20 mm strap: all 7 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure.
Doxa SUB 300 Ti5 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.
SUB 300 Ti5 Caribbean Dive Flex
Lug width: 20 mm
Source: MakerCase size: 42.5 mmYear: 2026Blue dialCase material: Grade 5 titanium
SUB 300 Ti5 Professional Dive Flex
Lug width: 20 mm
Source: MakerCase size: 42.5 mmYear: 2026Orange dialCase material: Grade 5 titanium
SUB 300 Ti5 Redcoral (Black)
Lug width: 20 mm
Source: MakerCase size: 42.5 mmCase material: Grade 5 Titanium
SUB 300 Ti5 Redcoral (Red)
Lug width: 20 mm
Source: MakerCase size: 42.5 mmCase material: Grade 5 Titanium
SUB 300 Ti5 Sharkhunter (Black)
Lug width: 20 mm
Source: MakerCase size: 42.5 mmCase material: Grade 5 Titanium
SUB 300 Ti5 Whitepearl (Black)
Lug width: 20 mm
Source: MakerCase size: 42.5 mmWhite dialCase material: Grade 5 Titanium
SUB 300 Ti5 Whitepearl (White)
Lug width: 20 mm
Source: MakerCase size: 42.5 mmWhite dialCase material: Grade 5 Titanium
No reference matches.
The Doxa SUB 300 Ti5 takes a 20 mm strap: all 7 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure. The Doxa SUB 300 Ti5 ref. 823.50.201.32, 823.50.351.21 and 5 more take 20 mm (listed by the maker).
From our database, which lists 7 Doxa SUB 300 Ti5 references, 7 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.