Watch Size Guide

Find the right case diameter for your wrist — with an interactive calculator and full size chart.

Wrist Size Calculator

How to measure: Wrap a soft tape measure or a strip of paper around your wrist just below the wrist bone. Note the measurement in millimetres.

170mm
130mm (very slim)220mm (very large)

Recommended case sizes for a 170mm wrist:

Slim / Dress
34–38mm

Classic dress watch proportions. Sits flush under a shirt cuff. Ideal for formal occasions.

✓Slim fit

• Orient Bambino (40mm — slightly large)

• Junghans Max Bill (38mm)

• Tissot Carson (39mm)

Classic / Versatile
39–42mm

The most versatile case size. Works for dress, casual, and sport. The modern standard.

⭐Classic fit — ideal

• Seiko 5 SNK809 (37mm)

• Hamilton Jazzmaster (40mm)

• Tissot PRX (40mm)

Sport / Contemporary
43–46mm

Modern sport watch sizing. Visible presence on the wrist. Great for casual and outdoor wear.

💪Bold fit — statement

• G-Shock GA2100 CasiOak (45mm)

• Casio MDV-106 Marlin (44mm)

• Seiko Prospex (45mm)

Bold / Statement
47mm+

Statement pieces. Best suited to larger wrists. G-Shock Gravitymaster territory.

⬆️Oversized for your wrist

• G-Shock Gravitymaster (54mm)

• Citizen Skyhawk (48mm)

• Citizen Promaster Sikorsky (47mm)

Watch Size Chart
Wrist SizeRecommendedAvoidNotes
Under 150mm34–38mm44mm+Slim dress watches are ideal
150–160mm36–40mm45mm+Classic sizing works well
160–170mm38–42mm48mm+Most versatile range
170–180mm40–44mm50mm+Sport and dress both work
180–190mm42–46mm—Sport sizing looks proportional
190mm+44–48mm—Bold sizing suits large wrists
Beyond Case Diameter — Lug-to-Lug Width

Case diameter is only one dimension. The lug-to-lug measurement — the distance from the top lug to the bottom lug — determines how far the watch extends across your wrist. A 40mm watch with a 48mm lug-to-lug will wear larger than a 42mm watch with a 46mm lug-to-lug.

As a general rule, your lug-to-lug should not exceed your wrist width. For a 170mm wrist, your wrist width is approximately 47–48mm, so a watch with a 48mm+ lug-to-lug will overhang the wrist.

The case thickness also matters — a 12mm+ thick watch will look chunky under a shirt cuff, while a 9–10mm case disappears elegantly.

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