Why Ring Sizes Differ Between Countries?

In practice, the same fit can be denoted by different systems. In the US, US ring size is more commonly used, in the UK — the letter system UK, while Europe and Russia focus on millimeters. That's exactly why searches like ring size chart and international ring size conversion remain consistently in demand: people need not just a number, but a clear correspondence between countries.

How to Convert Russian Size to International?

The most reliable way is this: first determine your size by inner diameter or circumference, then find it in the international chart and only after that compare the RU / US / EU / UK systems. This is especially important if you're buying jewelry not from a Russian store, but from a brand with international shipping.

When It's Best to Check Size Using the Chart?

If you're not sure about your measurement, start with the basic article how to find ring size at home, and then proceed to international conversion.

What to Do If Size Falls Between Two Values?

If the chart shows an intermediate result, look at the actual fit. Narrow rings sit looser, while wide rings feel tighter. So when in doubt, it's helpful to check the size not only by one scale, but also by feel, band width and ring type.

Ring Size RU, US, EU and UK: Complete Conversion Chart

ADVICE

The official ring size conversion chart helps you quickly convert a local ring size into RU, US, UK, EU, and other standards. Use it when shopping online, choosing a gift, or checking your size before ordering a ring.

How to use the ring size chart

First measure the ring or finger in a way that feels most reliable for you. Then find the matching value in the chart and compare it with the international standards. If you have not measured yet, start with the online ring size tool.

Choose your size (Russia):

mm ⌀	Russia	USA	UK	France	China	Italy
12.04	—	½	A	38	—	—
12.45	—	1	B	39	1	—
12.85	—	1 1/2	C	40	—	1/2
13.06	—	1 3/4	C ½	41	—	1
13.26	13	2	D	42	2	1 3/4
13.46	13 1/4	2 1/4	D ½	42	—	2 1/4
13.67	13 1/2	2 1/2	E	43	3	3
13.87	13 3/4	2 3/4	E ½	44	—	3 1/2
14.07	14	3	F	44	4	4 1/4
14.27	14 1/4	3 1/4	F ½	45	5	4 3/4
14.48	14 1/2	3 1/2	G	46	—	5 1/2
14.68	14 3/4	3 3/4	G ½	46	6	6
14.88	15	4	H	47	7	6 3/4
15.09	—	4 1/4	H ½	47	—	7 1/2
15.29	15 1/2	4 1/2	I	48	8	8
15.49	—	4 3/4	J	49	—	8 3/4
15.7	15 3/4	5	J ½	49	9	9 1/4
15.9	16	5 1/4	K	50	—	10
16.1	16 1/4	5 1/2	K ½	51	10	10 1/2
16.31	—	5 3/4	L	51	—	11 1/4
16.51	16 1/2	6	L ½	52	11	12
16.71	16 3/4	6 1/4	M	53	12	12 1/2
16.92	—	6 1/2	M ½	53	13	13
17.12	17	6 3/4	N	54	—	13 3/4
17.32	17 1/4	7	N ½	54	14	14 1/2
17.53	17 1/2	7 1/4	O	55	—	15
17.73	17 3/4	7 1/2	O ½	56	15	15 3/4
17.93	—	7 3/4	P	56	—	16 1/4
18.14	18	8	P ½	57	16	17
18.34	18 1/4	8 1/4	Q	58	—	17 1/2
18.54	18 1/2	8 1/2	Q ½	58	17	18 1/4
18.75	18 3/4	8 3/4	R	59	—	19
18.95	19	9	R ½	60	18	19 1/2
19.15	—	9 1/4	S	60	—	20 1/4
19.35	19 1/4	9 1/2	S ½	61	19	20 3/4
19.56	—	9 3/4	T	61	—	21 1/2
19.76	20	10	T ½	62	20	22
19.96	—	10 1/4	U	63	21	22 3/4
20.17	20 1/4	10 1/2	U ½	63	22	23 1/2
20.37	—	10 3/4	V	64	—	24
20.57	20 3/4	11	V ½	65	23	24 1/2
20.78	—	11 1/4	W	65	—	25 1/4
20.98	21	11 1/2	W ½	66	24	26
21.18	21 1/4	11 3/4	X	67	—	26 1/2
21.39	21 1/2	12	Y	67	25	27 1/4
21.59	—	12 1/4	Y ½	68	—	27 3/4
21.79	21 3/4	12 1/2	Z	69	26	28 1/2
22	—	12 3/4	Z ½	69	—	29
22.2	22	13	—	70	27	29 3/4
22.4	—	13¼	Z 1	70	—	30 1/2
22.61	22 1/2	13½	—	71	—	31
22.81	—	13¾	Z 2	72	—	31 3/4
23.01	23	14	Z 3	72	—	32 1/4
23.22	—	14¼	—	73	—	33
23.42	23 1/2	14½	Z 4	74	—	33 1/2
23.62	—	14¾	—	74	—	34 1/4
23.83	23 3/4	15	Z 5	75	—	34 3/4
24.03	—	15¼	—	76	—	35 1/2
24.23	24 1/4	15½	Z 6	76	—	36
24.43	—	15¾	—	77	—	36 3/4
24.64	24 1/2	16	—	77	—	37 1/2

Full ring size conversion chart →

Measure ring size online →

How to measure ring size before converting

The most reliable approach is to measure the ring or finger first and convert it only after that. You can use the ring size measurement guide, the printable template, or the interactive tool on the site.

What to do if your size falls between two values

If your result sits between two sizes, think about the ring width and how snug the fit should be. Wider rings often work better in the slightly larger size, while thin rings usually feel better when they fit more precisely. You can find more practical advice in Tips and Answers.

When the chart is especially useful

This chart is most helpful in three situations: when you order a ring from an international store, when you need a gift size, and when you want to translate your usual size into another system. In all three cases, it is better to get a base measurement first through the online ring size tool and only then use the chart.

Frequently asked questions about ring size conversion

Can I use this chart when buying from foreign websites?
Yes. That is exactly when it is most useful, because it helps match your local size to the store’s system.

Can I use the chart without an existing ring?
Yes. Measure the finger first, then convert the result using the chart.

What if I still doubt the size after converting?
Check the result once again with the online ring size tool and review the practical notes in Tips and Answers.

How to use the ring size chart

How to measure ring size before converting

What to do if your size falls between two values

When the chart is especially useful

Frequently asked questions about ring size conversion

Related posts