1. Measure the internal diameter of a ring that fits the desired fingerEnsure your ruler starts at the 0mm mark.

2. Use the table below to determine your ring size.

Inside Diameter(MM)	Inside Circumference	US / Canada	UK / AU / ZA	FR / DE	IT	ES	JP / MY / SG
14.1	44.2	3	F	44	4	4.5	4
14.5	45.5	3.5	G	46	5	5.5	5
14.9	46.8	4	H	47	6	7	7
15.3	48	4.5	I	48	8	8	8
15.7	49.3	5	J-½	49	10	9.5	9
16.1	50.6	5.5	K-½	51	11	10.5	10
16.5	51.9	6	L-½	52	12	12	11
16.9	53.1	6.5	M-½	53	13	13	13
17.3	54.4	7	N-½	54	15	14.5	14
17.7	55.7	7.5	O-½	56	16	16	15
18.1	57	8	P-½	57	17	17	16
18.5	58.3	8.5	Q-½	58	18	18.5	17
19	59.5	9	R-½	59	20	19.5	18
19.4	60.8	9.5	S-½	61	21	21	20
19.8	62.1	10	T-½	62	22	22	21
20.2	63.4	10.5	U-½	63	24	23.5	22
20.6	64.6	11	V-½	64	25	24.5	23
21	65.9	11.5	W-½	66	26	26	25
21.4	67.2	12	X-½	67	27	27.5	26
21.8	68.5	12.5	Z	68	28	28.5	28
22.2	69.7	13	Z+1	70	30	30	29
22.6	71	13.5	Z+1.5	71	31	31	30
23	72.3	14	Z+3	72	32	32.5	31

Tips & Tricks

Measure your fingers at the end of the day when they’re at their largest.

Cold weather can shrink your fingers up to half a size, so make sure they’re warm.

Lastly, alcohol and salt can make your fingers swell, so refrain from measuring them after cocktails and appetizers.