Watch Sizing: Getting It Perfect
Author: Funny Items
Release time: 2026-08-25 00:29:16
View number: 11
Getting the Size Right
Watch sizing is the most common mistake buyers make. Here is the comprehensive sizing guide.
The Three Measurements
- Case diameter: width across the dial — the number everyone quotes
- Lug-to-lug: total height from tip to tip — the number that determines fit
- Thickness: height from caseback to crystal — affects cuff compatibility
Sizing Charts
| Wrist Size | Diameter | Lug-to-Lug |
|---|---|---|
| Under 6" (15cm) | 34-38mm | Under 42mm |
| 6"-7" (15-18cm) | 38-42mm | Under 48mm |
| 7"-8" (18-20cm) | 40-44mm | Under 52mm |
| Over 8" (20cm+) | 42mm+ | Any |
The Proportional Rule
A watch should not extend past the edges of your wrist. If the lugs overhang, it's too big — regardless of diameter. This is why lug-to-lug matters more than diameter.
Strap Width Proportion
The strap width should be roughly half the case diameter. A 40mm case suits a 20mm strap; a 36mm case suits an 18mm strap. Proportion matters more than exact numbers.
Frequently Asked Questions
Can I wear a 40mm on a 6" wrist?
Depends on lug-to-lug. If under 48mm, it can work. Measure first.
Where do I start?
Measure your wrist with a flexible tape. Compare to our sizing guide.
Where do our watches fit?
Every listing includes full dimensions. See the collection.
Keep reading: Why the 40mm Watch Case Is Perfect