Links Size Guide
38/40/41 - Fits Apple Watches 38mm, 40mm and 41mm - Fits Wrists 145mm - 210mm
42/44/45/49 - Fits Apple Watches 42mm, 44mm, 45mm and 49mm - Fits Wrists 145mm - 210mm
Please review underneath the face of your Apple Watch to determine the most appropriate size