Specifications:

High-Grade Silicone
Magnet Infused for Easy Wearing
Flexible and waterproof
Durable & Comfortable
Easy to Clean
Compatible with Apple Watch Only

Strap Width: 19mm (38/40/41mm) & 20mm (42/44/45/46/49mm)
Strap Length: 102mm+115mm (38/40/41mm) & 113mm+127mm (42/44/45/46/49mm)