Q:How to Confirm Lug Width?
A:Not sure which size you need? It’s easy:

1. Measure the distance between the two lugs (the “ears” of your watch) in millimeters.
2. Choose the corresponding strap width (e.g., 22mm lugs = 22mm strap).

Pro tip: Most watches list lug width in their user manual or on the manufacturer’s website.

Q:What size rubber strap fits Omega Seamaster 300?
A:The Omega Seamaster 300 uses different lug widths depending on the model.Most Seamaster 300 Heritage models use a 21mm strap, while Seamaster Diver 300M models typically use a 20mm strap.
Please check your watch reference before ordering.

Q:Is this Omega Seamaster 300 rubber strap waterproof?
A:This rubber strap is water resistant and designed for swimming, diving, and daily wear.However, the water resistance of your watch depends on the watch case and sealing condition, not only the strap.