Size Chart

Internal Diameter (MM) USA &
Canada
Adjustable Rings Europe UK/AU
15.7 5 S 50 J
16.5 6 S 52 L
17.3 7 M 55 N
18.1 8 M 57 P
18.9 9 L 60 R
19.8 10 L 62 T
20.6 11 - 64 V
21.5 12 - 67 X
22.3 13 - 69 Z