The right case size makes all the difference to how a watch looks and feels. Too big and it overwhelms the wrist; too small and it can look lost. This watch size guide explains how to measure your wrist and which case size will suit you, whether you are buying for yourself or choosing a gift.
How to measure your wrist
- Wrap a soft tape measure around your wrist just below the wrist bone, where you would wear a watch.
- If you do not have a tape measure, use a strip of paper or string, mark where it meets, then measure it against a ruler.
- Note the measurement in centimetres. Most adult wrists measure between 14cm and 20cm.
Watch size chart
| Wrist size | Suggested men's case | Suggested women's case |
|---|---|---|
| Under 15cm (small) | 36–39mm | 20–28mm |
| 15–17cm (medium) | 40–42mm | 28–34mm |
| 17–19cm (large) | 42–44mm | 34–38mm |
| Over 19cm (extra large) | 44–46mm | 38mm and above |
These are guidelines rather than rules. Many people simply prefer a bigger or smaller look, and fashion matters too: oversized watches are bolder, while smaller vintage-style sizes have become very popular again.
It is not just the diameter
- Lug-to-lug length: the distance from the top to the bottom of the watch. If it is wider than the top of your wrist, the watch will overhang.
- Case thickness: a slimmer case slides under a shirt cuff more easily.
- Bezel and dial: a thick bezel makes a watch look smaller, while a large dial with a thin bezel looks bigger.
- Strap or bracelet: integrated bracelets, like the Tissot PRX, wear neatly and can make a watch feel smaller than its diameter suggests.
Watches in every size
Small: Citizen Tsuyosa 37mm | NJ0200-50M
Price: £266
A compact 37mm automatic that is perfect for slimmer wrists or anyone who prefers a classic, understated size.
View the Citizen Tsuyosa 37mm | NJ0200-50M →
Medium: Tissot PRX Quartz Silver Dial 40mm | T137.410.11.031.00
Price: £316
40mm is the sweet spot for most men, and the PRX's integrated bracelet makes it especially comfortable.
View the Tissot PRX Quartz Silver Dial 40mm | T137.410.11.031.00 →
Large: Armani Exchange Banks Chronograph 44mm | AX1720
Price: £209
A confident 44mm chronograph for larger wrists or anyone who wants a watch with presence.
View the Armani Exchange Banks Chronograph 44mm | AX1720 →
Petite: Burberry City Petite 26mm | BU9234
Price: £378
A delicate 26mm women's watch that wears like a fine piece of jewellery.
View the Burberry City Petite 26mm | BU9234 →
Women's classic: Calvin Klein Wavy 32mm | K9U23141
Price: £258
32mm is a versatile women's size that is noticeable without being oversized.
View the Calvin Klein Wavy 32mm | K9U23141 →
Shop by style: men's watches, women's watches or all watches.
Frequently asked questions
What is the most popular men's watch size?
Around 40–42mm. It suits most wrists and works with both casual and formal outfits.
What size watch should a woman wear?
Most women suit 26mm to 36mm. Petite sizes of 26–30mm look elegant and jewellery-like, while 34–38mm gives a more modern, statement look.
Can a woman wear a men's watch?
Of course. Many women choose 36–40mm men's or unisex watches for a bold, contemporary style.
Is a 44mm watch too big?
Not for medium to large wrists of around 17cm or more. On smaller wrists, a 40–42mm watch usually looks more balanced.
