Watch Strap Size Guide: Lug Width, Wrist Size & Buckle Width

Watch Strap Size Guide: Lug Width, Wrist Size & Buckle Width

Use this guide to provide the three measurements needed for a custom Yostrap. If you are unsure at any step, email official@yostrap.com with your watch brand, model or reference number, and clear photos of the front, back, and lugs. We will confirm the required measurements before production.

1. Measure the lug width

The lug width is the inside distance between the two lugs where the strap attaches to the watch case.

  1. Remove the current strap if it blocks the measurement.
  2. Use a digital caliper for the most accurate result. A millimeter ruler can also be used.
  3. Measure the clear inside gap from one lug to the other.
  4. Record the result in millimeters, for example 18 mm, 20 mm, 22 mm, or 24 mm.

Do not measure the outside width of the lugs. If the shape is integrated, curved, or unusual, send photos before ordering.

2. Measure your wrist

  1. Wrap a flexible tape around the position where you normally wear your watch.
  2. Keep the tape close to the skin without pulling it tight.
  3. Record the measurement in millimeters or centimeters.

If you do not have a flexible tape, wrap a strip of paper around your wrist, mark where the ends meet, then measure the paper against a ruler.

3. Measure the buckle width

The buckle width is the inside width of the buckle where the strap passes through. Measure the current strap at the buckle end, or measure the inside opening of the buckle, in millimeters.

4. Tell us your watch model

Provide the brand, model name, and reference number when available. The same watch family can use different lug shapes or widths across references, so the model name alone may not be enough.

Standard spring bars and custom adapters

Many watches use a straight strap secured by a standard spring bar. Integrated, curved, screw-mounted, or proprietary lug systems may require a custom-shaped end, adapter, or different hardware. Compatibility must be checked from the exact reference and photos before production.

Before production starts

We confirm the watch model, lug width, buckle width, wrist size, and selected options before production. Production takes 7–14 days after confirmation, followed by 7–14 days for shipping. Estimated total delivery time is 14–28 days, with free worldwide tracked shipping.