Oittm Stainless Steel Replacement Band is specially designed for all models of Apple Watch. This iWatch strap is easy to install and remove and the size can be adjusted according to the circumstance of individual wrist. Instructions can be seen in the pictures on the top left corner of this page. Suitable for wrist circumference: Apple Watch 38mm Band - Suitable for 145-215mm Wrist size. Apple Watch 42mm Band - Suitable for 150-220mm Wrist size.Specifications: Applicable models: Apple Watch 38mm Strap material: Stainless steel : Length: 180mm Width: 22mm Weight: 92g If you need any assistance, please feel free to contact us with your Order ID. We will be glad to have a chance to address your concern. --Go to the product listing on Amazon and click the third-party sellers name. Click Contact the seller under Further Information. --Go to Your Orders, find your order in the list, and click Contact Seller. We take full responsibility for the quality of our products and will do our very best to solve your problem quickly and efficiently!