About this product: ZOX watch bands made for Apple Watches. Sizing - One size fits most. The watch bands have a clasp built into them to fit almost any size wrist. Sizing - One size fits most. The watch bands have a clasp built into them to fit almost any size wrist.Compatibility: Small fits Apple watch sizes 38mm/40mm/41mm Large fits Apple watch sizes 42mm/44mm/45mm/Ultra Material - The same buttery-soft and eco-friendly elastic that we produce our normal wristbands from. Width - 25mm. They are about the same width as our wider style ZOX.