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Watch Size Chart: Case Size & Band Size

Quick answer

Measure your wrist in cm: 15-16.5 cm suits a 38-40 mm case and 17-19 cm a 40-44 mm case. Common band widths are 18, 20 and 22 mm.

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Case size by wrist

Case size by wrist
Wrist (cm)Case (mm)
14-1534-38
15-16.538-40
16.5-1840-42
18-19.542-44
19.5+44-46

Band width by case size

Band width by case size
Case (mm)Band width (mm)
34-3816-18
38-4018-20
40-4220
42-4420-22
44+22-24

How to measure your wrist

Wrap a soft measuring tape around the wrist bone and read the number in cm.

Frequently asked questions

What watch size for a 17 cm wrist?
A 40-42 mm case.
Does lug-to-lug matter?
Yes, it should not overhang your wrist.

Related guides

Sources and further reading