Size : 38mm, 40mm, 41mm Band fits 130–200mm Wrists (Approximately) Strap Compatible with Apple Watch Series You can match most bands with any Apple Watch Series 3 or newer case of the same size. (The 41mm bands work with 38mm and 40mm cases; the 45mm bands work with 42mm and 44mm cases.) Personalize your Apple Watch with this soft silicone band designed for 38/40/41mm models. Lightweight, flexible, and comfortable for all-day wear, this durable strap offers a secure fit and modern style, making it perfect for workouts, casual outings, or everyday accessorizing.