Watch Strap Sizing Guide

Finding the right watch strap size is easier than it looks. This guide covers lug width, strap length, thickness, and wrist sizing — everything you need to order with confidence. You can also download our free printable wrist sizer and measuring gauge below.

Printable Wrist Sizer

Need a sizer to estimate your wrist size?

- You can download our printable wrist sizer.

Printable Measuring Gauge

Need a ruler to find out your lug width?

- You can download our printable measuring gauge and ruler.

About Strap Width

The strap width (lug width) is usually measured in millimeters (mm).

Watches come in different sizes. To determine the appropriate strap width for your watch, you will need to measure the lug width of your watch. This can be done with a ruler or a Vernier caliper.

The width of a two-piece watch strap is expressed in two numbers. For example, 20/18 – the first number 20mm is the width of the strap between the lugs of your watch, and the second number 18mm is the width of the strap at the buckle. A straight watch strap e.g. 20/20 has the same width at the lugs and the buckle, whereas a tapered watch strap e.g., 20/18 has a wider width at the lugs and a narrower width at the buckle.

 About Strap Length

The strap length is usually measured in millimeters (mm).

The length of a two-piece watch strap is expressed in two numbers. For example, strap length 120/70. The first number 120mm is the length of the tail side of the strap, and the second number 70mm is the length of the buckle side of the strap.

What Length Should I get?

First, you need to know your wrist size. Measure your wrist size with a measuring tape, or you can use a plain strip of paper, wrap it around your wrist where you usually wear your watch, and make a mark. Next, lay the strip flat and measure the distance between the starting point and the mark on the strip. This will be your wrist size.

Once you have your wrist measurement, refer to our length suggestions to find the correct strap size.

If you are on the cusp between two sizes, you may select the smaller size for a shorter tail, or larger size for a longer tail, depending on your preference. For example, if your wrist size is 180mm, medium 125/75 length would be just right. However, you may choose large 130/80 if you prefer a longer tail or a looser fit.

Please note that the measurements may vary slightly, depending on the case size and the shape of your watch. Should you need any assistance, please don’t hesitate to contact us.

Choosing Strap Thickness

Generally, a ±3.0mm watch strap should go well with most normal sized watches, while a ±4.0mm strap is suitable for Panerai and other large robust watches. This is just a suggestion. Ultimately, it still depends on personal preference when it comes to choosing the thickness of a strap.

Single Pass Strap Length

Single pass straps are cut as one continuous piece of leather that threads through both spring bars. Because of this construction, the total strap length works differently from a traditional 2-piece strap.

Our Garrison and 2-Keeper single pass straps are available in 3 lengths to suit different wrist sizes. Use your wrist measurement from the guide above to choose the right length for you.