21 mm watch straps
All our straps that measure 21 mm at the case end, in every material. An in-between width, increasingly common on 41 and 42 mm watches.
Check that your watch is 21 mm
The lug width is the gap between the two lugs of the case, where the strap attaches. Measure it with callipers, or read the width often stamped on the back of your current strap. The method is in How to measure your watch strap size.
Watches with 21 mm lugs
- Rolex: Submariner 41 mm, Deepsea (2008-2017), Explorer I 40 mm, Explorer II 42 mm (216570), Yacht-Master II 44 mm, Datejust 41 mm (2016 onwards), Oyster Perpetual 41 mm, Air-King 40 mm (126900).
- IWC: Big Pilot 43 mm, Pilot Chronograph 43 mm.
21-16 mm or 21-18 mm: the width at the buckle
The second figure is the width of the strap at the buckle: the smaller it is, the more the strap tapers. In 21 mm we offer 21-16 mm, 21-18 mm and 21-20 mm. If you reuse your buckle, keep the second figure of your current strap.
By material
In 21 mm you can choose between alligator, calf leather, vintage calf leather, rubber, NATO, ostrich, shell cordovan and salmon leather: each material has its own page.
Frequently asked questions
What does 21-16 mm mean? 21 mm between the lugs of the watch, 16 mm at the buckle.
Will a 21 mm strap fit 20 or 22 mm lugs? No. On 20 mm it is forced and deforms; on 22 mm it leaves a gap on each side. Take the exact width: 20 mm or 22 mm.
Should I change the spring bars with the strap? Yes if they are bent or if their ends no longer spring out cleanly. Replacement spring bars are chosen by lug width.