Size Converter
Instantly convert watch measurements between millimeters and inches.
mminches
mm
Common Case Size Values
Quick Reference
| mm | inches | Common Use |
|---|---|---|
| 18mm | 0.71″ | Lug width — dress watches |
| 20mm | 0.79″ | Lug width — most popular |
| 22mm | 0.87″ | Lug width — divers & field |
| 36mm | 1.42″ | Case size — classic/vintage |
| 40mm | 1.57″ | Case size — modern standard |
| 42mm | 1.65″ | Case size — sport watches |