Using this leather band for your Apple Watch is a breeze. Just attach it to your watch following the normal process. It's designed to fit Apple Watch Series 1, 2, 3, and 4 in sizes 38mm, 40mm, 42mm, and 44mm. When it comes to maintenance, keep it away from water as much as possible. If it gets dirty, you can use a soft, dry cloth to gently wipe it. Avoid using harsh chemicals as they can damage the 100% genuine leather. Store it in a cool, dry place when not in use to maintain its quality and appearance.