A watch that fits looks deliberate. A watch that does not fit looks borrowed. Fit comes down to three measurements, and you can take the first one with a strip of paper.
Step one: measure your wrist
Wrap a soft tape measure, or a strip of paper you then hold against a ruler, around your wrist just above the wrist bone, where a watch normally sits. Snug, not tight. Note the circumference.
- Under 6 inches (15 cm): small wrist.
- 6 to 7 inches (15 to 18 cm): medium wrist.
- Over 7 inches (18 cm): large wrist.
Most adults land between 6 and 7.5 inches. The rest of the guide keys off that number.
Step two: case diameter
Case diameter is the width of the case, measured across the dial, not including the crown. It is listed in the specifications on every product page, and it is the one that most affects how a watch reads on the wrist.
- Small wrist: 28 to 36 mm sits naturally. Many women's watches, and the classic dress sizes, live here.
- Medium wrist: 36 to 40 mm is the versatile band. A 38 mm watch will look elegant; a 40 mm will look a little more present.
- Large wrist: 40 to 44 mm keeps proportion. Above 44 mm the watch starts to dominate rather than accompany.
Taste moves these bands. Watches have grown and shrunk across decades, and a smaller case on a larger wrist reads as vintage and considered rather than undersized. The bands above are where a watch looks intentional to most eyes, not rules.
Step three: lug-to-lug, the measurement that decides fit
The lugs are the four horns that hold the strap. Lug-to-lug is the distance from the tip of the top lugs to the tip of the bottom lugs, and it is the measurement that decides whether a watch actually fits: if the lugs overhang the edges of your wrist, the watch will sit on top of you instead of around you, no matter how modest the diameter.
The rule is simple. Lug-to-lug should be less than the width of your wrist viewed from above. Measure that width with a ruler; on a 6.5-inch wrist it is typically around 50 to 55 mm. A round case with a 40 mm diameter usually measures 46 to 48 mm lug-to-lug, so it fits. Shaped cases, rectangular ones especially, sit differently: their long axis runs along the wrist, which is why they often wear smaller than their length suggests.
Thickness and shape
Thickness matters for how a watch slides under a cuff and how it balances. Under about 10 mm reads as slim and dress-appropriate; 11 to 13 mm is the everyday norm, particularly for automatics, whose rotor needs room. Square and rectangular cases wear smaller than a round case of the same width because the eye reads the shorter side; a 36 mm rectangular watch can sit on a small wrist that would find a 36 mm round case large.
Strap and bracelet sizing
Leather straps come with a range of holes and suit most wrists out of the box. Metal bracelets are sized by removing links; our ring watches sit on a stretch band, so there is nothing to size. If you are between sizes, or buying a bracelet piece as a gift, write to us with the wrist measurement before you order and we will confirm what will fit. We arrange resizing free of charge, before or after you order, and your order still ships within its usual processing time. Resizing we arrange doesn't affect your return; a strap or bracelet resized elsewhere, without us arranging it, makes the watch non-returnable. Keep any links we remove; they go back with the watch if you return it, so let us handle it.
Finding the size on our site
Every product page lists case diameter and case shape in the specifications table, and the collections can be filtered by case size (Up to 36 mm, 37–39 mm, 40–42 mm, and 43 mm & above). Start with Women's Watches or Men's Watches and narrow from there.