the watch band is suitable for wrist size 6.5"-8.8", and the replacement band can be shortened or extended using the included link the one-piece band with case is made of high-quality 316 steel, which is strong, shock-proof and drop-proof. enhanced comfort and durability, iwatch frame protection design (without bottom cover), it is convenient for you to charge directly without disassembling the case, the design is inspired by world-renowned brands, gradually showing slim and ultra-thin styles. the exquisite appearance is a fashion trend that is popular all over the world. the band is 2.5mm thick and has a net weight of 0.10 lbs. bringing you a sense of sophistication..syi