Details
Approximately:
Small - 2.5 cm with 3 mm hole (1" x 1/8")
Medium ~ 4 cm with 3 mm hole (1-1/2" x 1/8")
Medium/Large ~ 5 cm with 7 mm hole (2" x 5/16")
Large ~ 6.15 cm with 7 mm hole (2-1/4" x 5/16")
Extra Large ~ 7.25 cm with 7 mm hole (2-7/8" x 5/16")