Lug width measuring Nomos Club 18mm vintage leather strap

How to determine the “lug width” of your watch

The lug width or lug size of a watch describes the space between the two lugs of a watch case. Between the lugs, the strap is fitted to the watch case with the help of spring bars. Single pieced Perlon- or Nato-Straps are just pulled through the lugs and don’t have spring bars inside them; Nevertheless, they need to fit through the lugs and spring bars to hold on the watch on the wrist. The most common lug width is 20mm, but they can range from 18mm to 24mm. Some vintage- or ladies watches have even smaller widths.

When you want to buy one of our straps you need to know, which lug width you should select for your new watch strap. The watch can look bad with a too small or too big watch strap. The correct fit of the strap is very important. In the following article, we like to show you how to determine the correct strap and lug size.


Determining the correct strap size and lug width for your watch

Check your old strap

If your watch has a leather strap already, you can just take the old strap and check the width of it. Most leather straps have an imprinted number which stands for the lug width.

Close up Imprinted lug width of the vintage leather strap on a Nomos Club with a size of 18mm lug width

The imprinted “18” stands for a strap width of 18mm between the lugs.


Measure your watch

In some cases, the watch strap doesn’t offer you information about its size. Then you can just take the old strap and hold it to a ruler, or measure the watch itself. This way you can easily measure the lug width of your watch by yourself.

Rolex GMT Master II lug width 20mm

The lug width of the Rolex GMT Master II 116710LN is 20mm

Check in the world wide web

The homepage of the manufacturer of your watch may offer details about the lug width of your watch model. If you can’t even find it there, then you can check the watch database called WatchBase.  There you can check the lug width and other interesting details of your watch.

Ask us!

And if all of the mentioned methods don’t work for you, you can always contact us. We are happy to help you to choose the right strap with the correct size for your watch!

7 thoughts on “How to determine the “lug width” of your watch

  1. Erwin J.M.J.J. says:

    The lug width of my Festina watch is 28 mm. Do you also have NATO watch straps that fit this lug width?

    Kind regards,
    Erwin J.M.J.J. Houben

    1. Mick says:

      Hi Erwin,

      At the moment the largest lug width for our nato straps is 24mm.



  2. Massimo says:

    hello can i put on Zenith el primero 42mm? can you put the Depliant Closure? plus I have a 16.5 cm wrist … can it be shorter?

  3. Linda Williamson says:

    I need a watch strap that is 10cm lug to lug but then 20cm after the lug is it possible to get a replacement? The watch is a citizen eco-drive

    1. Mick says:

      Hi Linda, I would advise you to contact a citizen dealer. Cheers

  4. Maarten Mulder says:

    Hi there,

    I own an Omega speedmaster professional Mk2., 1970. At the moment the watch is in repair so I can’t measure the lug width. What strap size do I need to order?

    Thanks in advance!

    Maarten Mulder

    1. Mick says:

      Hi Maarten, I would need the reference number to be sure. Cheers,

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