Generally wear bracelets with an inner diameter of 50-52mm and 66-70mm. This should be chosen according to the thickness of your wrist. Watchmaking of bracelets and cuffs: 62-66 mm: bracelets with inner diameters of 50-52 mm, 66-70 mm: bracelets with inner diameters of 52-54 mm, 70-74 mm: bracelets with inner diameters of 54-56 mm and 74-78 mm: bracelets with inner diameters of 56-58 mm..