Find My Strap Width
Your strap width must match your watch’s lug width for a correct fit. Confirm your measurement in millimeters, then go straight to the straps that fit.
Not sure where to start? See the full strap sizing guide.
Your lug width determines your strap width
Lug width is the inside distance between your watch lugs. Choose a strap that matches this measurement exactly.
How to measure your lug width
Use a ruler with millimeters, or a set of calipers for the most accurate reading.
- Remove the strap or bracelet if it blocks access to the lugs.
- Place the ruler or calipers inside the lugs, right against the case walls.
- Read the distance in millimeters.
Common widths: 18mm, 19mm, 20mm, 21mm, 22mm, 24mm.
A 20mm lug width requires a 20mm strap.
Tip: If your measurement falls between sizes, measure again carefully or confirm the lug width with the watch manufacturer. Don't round to another size unless the manufacturer specifies that width.
Know your watch model?
If you know your exact watch model, you may be able to confirm the lug width in the manufacturer’s specifications or owner’s manual. When in doubt, measure the watch directly.
Shop by width
Select your lug width to view straps that will fit.
Common questions
What if the strap is 1mm off?
Too narrow: the strap can shift and expose gaps. Too wide: it usually won’t fit and can compress or abrade the strap edges and may make installation difficult.
Does the buckle width need to match?
Not always. Many straps taper toward the buckle. When replacing a buckle or adding a deployant clasp, match the width at the buckle end. See our Strap Taper Guide for more help.
Using an Apple Watch adapter?
Apple Watch adapters allow a conventional watch strap to be used with an Apple Watch. Our Apple Watch adapters accept 22mm straps, so choose a 22mm strap regardless of the Apple Watch case size.
Need help choosing the correct length? See our Strap Length Guide.
