TJS Ring Sizes

Note: All our rings are measured and standardized with a ring size mandrel bar stick. The reading is taken as center with a tolerance of one quarter of a size.

Ring Size Illustration
Our Size Diameter (mm) Circumference (mm) USA / Canada U.K.
Extra Small 15.70 48.7 5 J ½
Small 16.51 51.2 6 M
Medium 17.35 53.8 7 O
Large 18.19 56.3 8 Q
Extra Large 18.89 58.9 9 R ½