Niche verticals May 17, 2027 5 min read
Size Guide for Watch Brands (Case + Strap)
Watch sizing has two dimensions: case width (mm) and strap length (S/M/L). Plus lug width (where strap attaches) for replacement straps.
The Chart
| Brand | Common Case Sizes | Strap System |
|---|---|---|
| Rolex | 36mm to 44mm | Branded straps |
| Apple Watch | 38/40/41/45/49mm | S/M/L by wrist |
| Casio | Varies | 20-22mm lugs |
| Citizen | Varies | 18-22mm lugs |
| Garmin | Smart sizing | S/M/L |
FAQs
Case size by wrist?
Rule: case width ≤ wrist width. Wrist 6 in: 36-40mm case. Wrist 7 in: 40-44mm. Wrist 8+ in: 44mm+.
Apple Watch S/M/L bands?
Pre-order: based on wrist circumference. S: 5.1-5.9 in. M: 6.1-7.5 in. L: 7.5-9.6 in. Each Apple Watch ships with M+L by default.
Need this on your store?
Tailor Size Guide ships pre-built size charts for Shopify.