Apple Watch® users: Keep your investment protected while adding some much-needed shine! This case cover accented with premium crystals adds a sparkle to your classic Apple Watch® look and protects your prized possession from damage. The outer case is made from metal and comes in four different sizes: 40mm, 41mm, 44mm and 45mm. Fit: 40/41mm model Band circumference including Apple Watch® device: 178mm-193mm (7"-7.5") Band width: 18mm 44/45/ model Band circumference including Apple Watch® device: 182mm-197mm (7-7.75") Band width: 20mm