Size Chart

 INTERNAL DIAMETER (MM) 14.1 14.9 15.7 16.5 17.3 18.1 19.0 19.8 20.6 21.4 22.2
 US/CANADA RING SIZE 3 4 5 6 7 8 9 10 11 12 13
 UK/AUSTRALIA RING SIZE F H J L N P R T V X Z