UK Ring Size Guide

UK Size Diameter (mm) Circumference (mm)
15 43*53 154
15.5 44*54 157.47
16 45*55 160.33
16.5 46*56 163.50
17 47*57 167.29
17.5 48*58 170.07
18 49*59 173.02
18.5 50*60 176.16
19 51*61 179.27
19.5 52*62 182.43
20 53*63 185.60
20.5 54*64 188.67
21 55*65 191.93
21.5 56*66 195.41