For Apple Watch Ultra 2 Case, M1 Sport Series Durable Bumper and Screen Protector Fits Iwatch Ultra2/1 Bands 49Mm, Waterproof Gym Workout Accessories for Running Swimming Boating - Navy Blue. Compatible Model: Adjustable strap fits most wrists (5.71"-8.74"), suitable for Apple Watch Ultra 2/1 49mm.
eBay