Leather Watch Strap Size Chart – Length and Width in MM and Inches

Lovely, it is here! A complete article about the sizes of a leather watch band. Think of the thickness, width and length of the leather strap. The perfect size ultimately also depends on the size of your wrist and watch case.

Leather watch band size table

In this post we will look at:

The width sizes of a leather watch strap

The most common watch strap size is 18 mm to 22 mm. The 18 mm strap size is often used for women’s watches and the 20 mm band size for men’s watches. Why would you think? Because a leather strap is often half the size of the watch case. This is a good ratio of design. A standard ladies watch is usually 36 mm wide and a men’s watch 40 mm wide.

What width strap sizes are there?

The average case size is a guideline that can vary by design. Also, people with a small wrist generally appreciate a narrower watch band.

Strap size width in MMStrap size width in InchesCommon watch case size
6 mm0.23 inch22 – 26 mm
8 mm0.31 inch22 – 32 mm
9 mm0.35 inch22 – 32 mm
10 mm0.39 inch22 – 30 mm
11 mm0.43 inch22 – 32 mm
12 mm0.47 inch24 – 30 mm
13 mm0.51 inch24 – 32 mm
14 mm0.55 inch24 – 32 mm
15 mm0.59 inch29 – 30 mm
16 mm0.63 inch28 – 33 mm
17 mm0.67 inch31 – 34 mm
18 mm0.71 inch34 – 39 mm
19 mm0.75 inch35 – 38 mm
20 mm0.79 inch38 – 43 mm
21 mm0.83 inch40 – 42 mm
22 mm0.87 inch40 – 45 mm
23 mm0.91 inch43 – 46 mm
24 mm0.95 inch42 – 50 mm
25 mm0.98 inch42 – 50 mm
26 mm1.02 inch42 – 50 mm
27 mm1.06 inch42 – 50 mm
28 mm1.10 inch42 – 50 mm
29 mm1.14 inch42 – 50 mm
30 mm1.18 inch42 – 50 mm
32 mm1.26 inch42 – 50 mm
34 mm1.34 inch42 – 50 mm
36 mm1.42 inch44 – 50 mm
38 mm1.50 inch44 – 50 mm

How to measure the width of a watch strap?

There are 3 options to measure the width of a watch strap. First, you can look for a number on the back of the strap. This is the size in MM. Secondly, measure the size between the lugs. Third, you can divide the watch case size by 2.

1. Look for a number on the back of the strap

This number is the width in mm. See the photo below for an example.

measure leather watch strap width size
2. Measure the size between the lugs of the watch case

You measure the width of a watch strap between the lugs of the watch case. So that is the connecting piece of the band with the case. Because this has the same size on both sides. If you measure a different section, this width may differ. Because some watch straps can slope towards the buckle.

measure width watch strap
3. Divide the watch case by 2

Please note: this is not always the right measurement! It also depends on the complete design. It can also differ by a millimeter. For example, do you measure a case size of 43 mm? Then the band is most of the time 22 mm instead of 21 or 21.5 mm. Because designers usually work with even numbers.

The length chart of leather watch bands

The standard women watch strap size is 6.38 to 8 inches (162.5 – 203.5 mm) and the standard band size for men is slightly bigger with 7.75 to 9.5 inches (196.5 – 243 mm). Because the perfect size depends on height, weight and age.

Find below the complete watch strap size in total length of the strap. Below that we explain how you can measure the complete band size.

Watch strap size in total length

Wrist Circumference in mmWrist circumference in inchesTotal strap length in mmTotal strap length in inches
120 – 130 mm4.7 – 5 inch156 mm6.1 inch
131 – 140 mm5 – 5.5 inch166 mm6.5 inch
141 – 150 mm5.5 – 5.9 inch176 mm6.9 inch
151 – 160 mm5.9 – 6.3 inch186 mm7.3 inch
161 – 170 mm6.3 – 6.7 inch192 mm7.6 inch
171 – 180 mm6.7 – 7.1 inch202 mm7.9 inch
181 – 190 mm7.1 – 7.5 inch210 mm8.25 inch
191 – 200 mm7.5 – 7.9 inch217 mm8.5 inch
201 – 210 mm7.9 – 8.3 inch227 mm8.9 inch
211 – 220 mm8.3 – 8.6 inch231 mm9.0 inch
221 – 230 mm8.6 – 9.0 inch235 mm9.25 inch
231 – 240 mm9.0 – 9.4 inch245 mm9.5 inch
241 – 250 mm9.4 – 9.8 inch255 mm10 inch
251 – 260 mm9.8 – 10.2 inch265 mm10.25 inch

Length classifications of men’s and women’s watch straps

ClassificationLength size in inchesLength size in mm
XS5.75 – 6.25 inches145 – 159 mm
S6.25 – 7.00 inches160 – 179 mm
M7.00 – 7.75 inches180 – 199 mm
L7.75 – 8.50 inches199 – 215 mm
XL8.50 – 9.25 inches215 – 235 mm
XXL9.25 – 10.25 inches235 – 260 mm

How to measure the length of a strap

You can measure the length of a watch strap by adding the buckle side and the tail side. Then you will get the total length in mm. Make sure you don’t count the closure and watch case.

How to measure watch strap length

If you want to know the perfect size for your wrist, you can also count the watch case.

The options relate to the thickness

With the thickness of a watch strap, 1 mm can already make a difference. The general rule is that the longer the watch band, the thicker it often is.

This is also important for the design of your accessory. The larger the watch case, the thicker the watch band usually is. Because this ensures the right proportion.

However, there are exceptions, such as the NATO strap that must always be able to fit under the watch case. A watch strap can also be filled and become thinner at the closure. In that case, a strap has several thicknesses. That is why we prefer to measure this as close as possible to the watch case. You then have the best idea of the desired thickness.

Below we give a complete overview of the different thicknesses. Perhaps it will help you make your choice. It is a pity that many suppliers do not yet mention the thickness of the straps. Because measuring the complete range takes quite some time. So it is often skipped.

That is why we have various classifications in which the thicknesses are subdivided.

Thickness of a watch strapClassification
1 – 1.5 mmVery thin (For example a thin NATO strap).
1.5 – 2.0 mmThin
2.0 – 2.5 mmNormal
2.5 – 3.0 mmMedium
3.0 – 3.5 mmSemi bold
3.5 – 4.0 mmBold
4.0 – 4.5 mmExtra bold
4.5 – 5.0 mmBlack
5.0 – 6.0 mmThickest

Keep in mind that a thicker watch strap actually makes the band a little bit shorter. After all, it molds to your wrist. So do not take a watch strap that is too short.

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You can also read more about jewelry sizing.

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