Size Dia (in) Dia (cm) Dia (mm) Wrist
2.2 2.125″ 5.4 cm 54 mm 6.6″ – 6.8″
2.4 2.25″ 5.7 cm 57 mm 6.9″ – 7.1″
2.6 2.375″ 6.0 cm 60 mm 7.2″ – 7.4″
2.8 2.5″ 6.3 cm 63 mm 7.5″ – 7.7″