Ghid mărimi inele

US	EU	Circ.	Diam.	Nr.
5	49.3	49.3mm	15.7mm	8.5
6	51.9	51.9mm	16.5mm	12
7	54.4	54.4mm	17.3mm	14.5
8	57	57mm	18.1mm	17
9	59.5	59.5mm	18.9mm	20
10	62.1	62.1mm	19.8mm	22
11	64.6	64.6mm	20.6mm	25
12	67.2	67.2mm	21.4mm	28