Cheap 21mm Watch Straps
21mm is an uncommon but important lug width used by the Omega Planet Ocean and some vintage Rolex references. It sits between the ubiquitous 20mm and 22mm, which means fewer off-the-shelf options — but AliExpress still carries quality leather and rubber at this width. Budget $5–$18.
Watches that use 21mm straps
Popular strap styles at 21mm
Buying tips
- 0121mm is less common than 20mm or 22mm — verify your lug width carefully before ordering.
- 02The Omega Planet Ocean uses 21mm — search 'rubber strap 21mm' or 'leather strap 21mm Planet Ocean'.
- 03IWC Big Pilot 43mm also uses 21mm — padded leather suits it best.
- 04If you can't find 21mm specifically, a watchmaker can sometimes trim a 22mm strap.
19 cheap 21mm watch straps
18mm 19mm 20mm 21mm 22mm Silicone Watch Band Rubber Waterproof Strap Quick Release Replacement Bracelet Sport Soft Wristband
FKM Fluoro Rubber Strap for IWC Big Pilot Mark Portugieser TOP GUN Men Quick Release Waterproof Sport Watch Band 20mm 21mm 22mm
20mm 21mm 22mm Fluoro Rubber Strap for Omega Seamaster Folding Buckle for Speedmaster Quick Release Diver Watch Band for Rolex
Quick Release Rubber Strap 18mm 19mm 20mm 21mm 22mm 24mm Watchbands Silicone Wristband Sport Bracelet Waterproof Watch Band
Quick Release Silicone Watch Strap 20mm 22mm Rubber Sports Watchbands for Seiko for Tudor Bracelets Black Green Orange Wristband
Sailcloth Design FKM Rubber Watch Strap 20mm 21mm 22mm Quick Release For Rolex Daytona Cartier CTS Rubber Watch Bands For Men
20mm 21mm 22mm Fluoro Rubber Strap for Omega Seamaster Folding Buckle for Speedmaster Quick Release Diver Watch Band for Rolex
Quick Release Watch Straps for IWC PILOT Portugal PORTOFINO 20mm 21mm 22mm Premium Grade Rubber Bands Waterproof Sport Bracelets
Collectors searching for 21mm straps
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Try the tool →Frequently asked questions
What watches use 21mm straps?
The Omega Planet Ocean 43.5mm uses 21mm. Some vintage Rolex Submariner references and the IWC Big Pilot 43mm also use 21mm. It's less common than 20mm or 22mm.
Are 21mm straps hard to find?
Harder than 20mm or 22mm, but AliExpress carries them. Search '21mm watch strap rubber' or '21mm leather watch strap'. Filter by 4.5+ stars for quality.
Can I use a 20mm strap on a 21mm watch?
A 20mm strap will be 1mm narrower than the lug gap and will look slightly off. For the best fit, use 21mm specifically.