Size guide - Ring

Circumference Diameter US EU
48mm 15.3mm 4.5 48
50mm 16mm 5 50
52mm 16mm 6 50
54mm 16mm 7 50
56mm 16mm 7.5 50
58mm 16mm 8.5 50
60mm 16mm 9 50
62mm 16mm 10 50
64mm 16mm 10.5 50