International Ring Size Conversion Chart

Ring Diameter (MM)	USA/Canada	United Kingdom	France	Germany	Japan	Switzerland
14.0 mm.	3	F	44	14	4	4
14.4 mm.	3½	G	45¼	14½	5½	6⅓
14.8 mm.	4	H½	46½	15	7	6½
15.2 mm.	4½	I½	47¾	15¼	8	8
15.6 mm.	5	J½	49	15¾	9	9½
16.0 mm.	5½	L	50¾	16	10½	10¾
16.5 mm.	6	M	51½	16½	12	12¾
16.9 mm.	6½	N	52¾	17	13	14
17.3 mm.	7	O	54	17¼	14	15¼
17.7 mm.	7½	P	55¼	17¾	15	16½
18.2 mm.	8	Q	56¾	18	16	17¾
18.6 mm.	8½	Q½	58	18½	17	18½
19.0 mm.	9	R½	59¼	19	18	20
19.4 mm.	9½	S½	60¾	19½	19	21
19.8 mm.	10	T½	61¾	20	20	21¾
20.2 mm.	10½	U½	62¾	20¼	22	22¾
20.6 mm.	11	V½	64¼	20¾	23	24
21.0 mm.	11½	W½	66	21	24	25¾
21.4 mm.	12	Y	67¼	21¼	25	27½
21.8 mm.	12½	Z	68	21¾	26	28¾
22.2 mm.	13	Z + 1	69	22	27	29¼
22.6 mm.	13½	Z + 1.5	71	22.6	-	31

Necklace Chain Length

35CM/13.77in

40CM/15.74in

45CM/17.71in

50CM/19.68in

Bracelets Chain Length

15CM/5.90in

18CM/7.08in

20CM/7.87in

22CM/8.66in