Size | 38mm/40mm/41mm, 42mm/44mm/45mm | 38mm/40mm/41mm, 42mm/44mm/45mm/49mm | 38mm, 40mm, 42mm, 44mm | 38mm, 40mm, 41mm, 42mm, 44mm, 45mm | 38mm, 40mm, 41mm, 42mm, 44mm, 45mm | 38mm, 40mm, 42mm, 44mm |
Compatibility | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4; 41mm, 45mm for Apple Watch Series 7 | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4; 41mm, 45mm for Apple Watch Series 7/8; 49mm for Apple Watch Ultra | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4 | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4; 41mm, 45mm for Apple Watch Series 7 | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4; 41mm, 45mm for Apple Watch Series 7 | 38mm, 42mm for Apple Watch Series 3/2/1; 40mm, 44mm for Apple Watch Series SE/6/5/4 |