Product Details: - Size 44 & 45 Support Apple Watch Ultra - Two Colors, One Strap! - Three Ways To Wear It. - Meet Revix, Uniq Reversible Silicone Watch Strap That Lets You Switch It Up From Sleek To Bold In A Single Flip. - Made From Soft Silicone Is Specially Treated To Resist Sweat And Dust Adhesion With A Lasting Smooth Finish. - Support All Apple Watch Series. - Support Sizes: 42 - 44 - 45.