Posted on 26 October 2017 by

Finding your strap size

The size of your required watch strap will be determined on the lug width of your watch.

You can easily determine the lug width by measuring the gap between the two metal points (lugs) on your watch - where the band meets the body and you should be able to do this without removing the existing strap.

What if I don't have my watch or a ruler close by?

If you aren't able to measure your watch, simply google your watch brand and model number followed by "Lug width".

For example Omega speedmaster lug width and Timex weekender lug width

Alternatively - you can use our Watch Strap Sizing guide to find the lug width for your watch.

What if my watch is an odd width, such as 19mm,21mm or 23mm?

If your watch is an odd width, you should be fine rounding up to the next even number (i.e. if your watch is 19mm, use a 20mm strap), as the straps will flex to fill the 0.5mm difference on each side.

Questions & Comments (9)

Rolex Submariner

Hi how do you fit the strap on to submariner ?

Hi Max - I found this youtube video which runs through the process -

Casio W-800H

Hi, i have a Casio W-800H. i want a NATO strap for comfort and reliability, lug to lug inside is roughly 17/18mm. Thanks Lewis

Hi Lewis, You're correct - the Casio W-800H will fit any of our canvas 18mm straps, however the leather straps may be too thick for the clearance so I'd steer away from those. Cheers, Brad

Omega Speedmaster

What size do I need?

Hi Sam, The full sized speedy pro takes a 20mm strap, and the 'reduced' will take a 18mm strap.

Casio F91W


Hello, the F91W will take a 18mm NATO

casio pro-trek PRG-130 Strap

Hi, I have a Casio pro-trek PRG-130 and would love to get a few NATO straps from you, my question is.. the attachment doesn't look like it would work with the NATO straps. would you be able to confirm this please?

Hi Fabian, It looks like you'll need a converter kit. I did a quick google and the set found here looks suitable, or you can use this thread - - to source the parts directly from Casio

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