Omega Watch Strap Sizes
Lug width and strap fitting for every Omega model in our index. Tap a watch for the full guide.
Across the 4 Omega models with standard lugs in our index, lug widths are 20mm (3), 21mm (1). The most common is 20mm, but don't assume: sizes vary within the brand, so check your exact model below. the Seamaster Planet Ocean 43.5 uses an odd 21mm lug width (strap options for odd sizes).
Omega lug width chart
| Model | Reference | Strap size | Case | Lug-to-lug |
|---|---|---|---|---|
| Speedmaster Moonwatch | 310.30.42 | 20mm | 42mm | 48mm |
| Seamaster Diver 300M | 210.30.42 | 20mm | 42mm | 49mm |
| Aqua Terra 41 | 220.10.41 | 20mm | 41mm | 48mm |
| Seamaster Planet Ocean 43.5 | 215.30.44 | 21mm | 43.5mm | 49mm |
Strap size = lug width. Not sure which model you have? Measure it or see the strap size chart for every brand.