Calculate your watch size
How to measure your wrist
- Wrap a soft tape measure around your wrist just above the wrist bone — where you wear your watch.
- Keep it snug but not tight, and read the measurement.
- No tape? Wrap a strip of paper around your wrist, mark where it overlaps, and measure the strip with a ruler.
How the calculator works
The calculator uses proportions that reflect widely accepted guidance and the dimensions of popular watches:
- Ideal diameter scales with your wrist circumference. "Classic" shifts the range smaller (vintage and dress proportions); "Bold" shifts it larger for a modern sporty look.
- Maximum lug-to-lug is estimated from the approximate width of the top of your wrist (about 31% of its circumference). Lugs shouldn't extend beyond the edges of your wrist.
- Comfortable thickness keeps the watch proportionate and under your cuff.
- Strap width is roughly half the case diameter, rounded to an even size.
Remember
These are guidelines, not rules. Flat wrists can wear larger watches; round wrists smaller. Case shape, bezel width and dial colour change how big a watch looks. Read the full watch size guide for details.
Quick size chart
| Wrist | Typical ideal diameter | Max lug-to-lug |
|---|---|---|
| 15 cm (5.9 in) | 34–37 mm | ~46 mm |
| 16 cm (6.3 in) | 36–39 mm | ~49 mm |
| 17 cm (6.7 in) | 38–41 mm | ~52 mm |
| 18 cm (7.1 in) | 41–44 mm | ~55 mm |
| 19 cm (7.5 in) | 43–46 mm | ~58 mm |
FAQ
What size watch is right for a 7-inch wrist?
A 7-inch (17.8 cm) wrist suits roughly 39–43 mm for sports watches and 37–40 mm for dress watches, with lug-to-lug under about 54 mm.
What size watch for a 6.5-inch wrist?
A 6.5-inch (16.5 cm) wrist generally suits 37–40 mm, with lug-to-lug under about 50 mm.
