By continuing to use this website, you are agreeing to our Privacy, Security and Cookie Policy

Ring Sizes


The scale of ring sizes varies from country to country. The tables below gives a table of approximate equivalents in different countries. The left most 3 columns will be exact, but as there is no exact equivalent between most scales the columns to the right show the closest match, not an exact one. Please note this is intended as a guide only. Also be aware that no country exclusively uses a particular scale, so you may for example often find US sized rings in the UK.


The UK column covers: United Kingdom, Ireland, Australia, New Zealand, South Africa

The US column covers: United States, Canada, Mexico

EU ISO column covers: Most European countries

The Italy column covers: Italy, Spain, Switzerland, Netherlands, Brazil, India

The Russia column covers: Russia, Ukraine, Belarus

The Japan column covers: Japan, China, Korea, Hong Kong, Taiwan, Singapore.


Diameter and Circumference measurements are in mm


UK to other sizes

UK Size Diameter Circumference US EU ISO Italy Russia Japan
A 11.937 37.5 37½ 12
12.036 37.813 37¾ 12
12.136 38.125 38¼ 12¼
12.235 38.438 38½ 12¼
B 12.335 38.75 38¾ 12¼
12.434 39.063 1 39 12½
12.533 39.375 1 39½ 12½
12.633 39.688 39¾ 12¾
C 12.732 40 40 0 12¾
12.832 40.313 40¼ 12¾
12.931 40.625 40¾ 13
13.031 40.938 41 1 13 1
D 13.13 41.25 41¼ 13¼
13.23 41.563 2 41½ 13¼
13.329 41.875 2 42 2 13¼ 2
13.429 42.188 42¼ 13½
E 13.528 42.5 42½ 13½
13.628 42.813 42¾ 13¾ 3
13.727 43.125 43¼ 13¾
13.827 43.438 43½ 13¾
F 13.926 43.75 43¾ 14
14.026 44.063 3 44 4 14 4
14.125 44.375 3 44½ 14¼
14.224 44.688 44¾ 14¼
G 14.324 45 45 5 14¼ 5
14.423 45.313 45¼ 14½
14.523 45.625 45¾ 14½
14.622 45.938 46 6 14½
H 14.722 46.25 46¼ 14¾
14.821 46.563 4 46½ 14¾
14.921 46.875 4 47 7 15
15.02 47.188 47¼ 15 7
I 15.12 47.5 47½ 15
15.219 47.813 47¾ 15¼
15.319 48.125 48¼ 15¼ 8
15.418 48.438 48½ 15½
J 15.518 48.75 48¾ 15½
15.617 49.063 5 49 9 15½
15.717 49.375 5 49½ 15¾
15.816 49.688 49¾ 15¾
K 15.915 50 50 10 16
16.015 50.313 50¼ 10¼ 16 10
16.114 50.625 50¾ 10¾ 16 10¼
16.214 50.938 51 11 16¼ 10¾
L 16.313 51.25 51¼ 11¼ 16¼ 11
16.413 51.563 6 51½ 11½ 16½ 11¼
16.512 51.875 6 52 12 16½ 11½
16.612 52.188 52¼ 12¼ 16½ 11¾
M 16.711 52.5 52½ 12½ 16¾ 12¼
16.811 52.813 52¾ 12¾ 16¾ 12½
16.91 53.125 53¼ 13¼ 17 12¾
17.01 53.438 53½ 13½ 17 13
N 17.109 53.75 53¾ 13¾ 17 13¼
17.209 54.063 54 14 17¼ 13¾
17.308 54.375 7 54½ 14½ 17¼ 14
17.408 54.688 7 54¾ 14¾ 17½ 14¼
O 17.507 55 55 15 17½ 14½
17.607 55.313 55¼ 15¼ 17½ 14¾
17.706 55.625 55¾ 15¾ 17¾ 15
17.805 55.938 56 16 17¾ 15½
P 17.905 56.25 56¼ 16¼ 18 15¾
18.004 56.563 56½ 16½ 18 16
18.104 56.875 8 57 17 18 16¼
18.203 57.188 8 57¼ 17¼ 18¼ 16½
Q 18.303 57.5 57½ 17½ 18¼ 17
18.402 57.813 57¾ 17¾ 18½ 17¼
18.502 58.125 58¼ 18¼ 18½ 17½
18.601 58.438 58½ 18½ 18½ 17¾
R 18.701 58.75 58¾ 18¾ 18¾ 18
18.8 59.063 59 19 18¾ 18½
18.9 59.375 9 59½ 19½ 19 18¾
18.999 59.688 9 59¾ 19¾ 19 19
S 19.099 60 60 20 19 19¼
19.198 60.313 60¼ 20¼ 19¼ 19½
19.298 60.625 60¾ 20¾ 19¼ 20
19.397 60.938 61 21 19½ 20¼
T 19.496 61.25 61¼ 21¼ 19½ 20½
19.596 61.563 61½ 21½ 19½ 20¾
19.695 61.875 10 62 22 19¾ 21
19.795 62.188 10 62¼ 22¼ 19¾ 21½
U 19.894 62.5 10¼ 62½ 22½ 20 21¾
19.994 62.813 10¼ 62¾ 22¾ 20 22
20.093 63.125 10½ 63¼ 23¼ 20 22¼
20.193 63.438 10½ 63½ 23½ 20¼ 22½
V 20.292 63.75 10¾ 63¾ 23¾ 20¼ 23
20.392 64.063 10¾ 64 24 20½ 23¼
20.491 64.375 11 64½ 24½ 20½ 23½
20.591 64.688 11 64¾ 24¾ 20½ 23¾
W 20.69 65 11¼ 65 25 20¾ 24
20.79 65.313 11¼ 65¼ 25¼ 20¾ 24¼
20.889 65.625 11½ 65¾ 25¾ 21 24¾
20.989 65.938 11½ 66 26 21 25
X 21.088 66.25 11¾ 66¼ 26¼ 21 25¼
21.188 66.563 11¾ 66½ 26½ 21¼ 25½
21.287 66.875 12 67 27 21¼ 25¾
21.386 67.188 12 67¼ 27¼ 21½ 26¼
Y 21.486 67.5 12¼ 67½ 27½ 21½ 26½
21.585 67.813 12¼ 67¾ 27¾ 21½ 26¾
21.685 68.125 12¼ 68¼ 28¼ 21¾ 27
21.784 68.438 12½ 68½ 28½ 21¾ 27¼
Z 21.884 68.75 12½ 68¾ 28¾ 22 27¾
21.983 69.063 12¾ 69 29 22 28
22.083 69.375 12¾ 69½ 29½ 22 28¼
22.182 69.688 13 69¾ 29¾ 22¼ 28½
Z+1 22.282 70 13 70 30 22¼ 28¾
Z+1¼ 22.381 70.313 13¼ 70¼ 30¼ 22½ 29¼
Z+1½ 22.481 70.625 13¼ 70¾ 30¾ 22½ 29½
Z+1¾ 22.58 70.938 13½ 71 31 22½ 29¾
Z+2 22.68 71.25 13½ 71¼ 31¼ 22¾ 30
Z+2¼ 22.779 71.563 13¾ 71½ 31½ 22¾ 30¼
Z+2½ 22.879 71.875 13¾ 72 32 23 30¾
Z+2¾ 22.978 72.188 14 72¼ 32¼ 23 31
Z+3 23.077 72.5 14 72½ 32½ 23 31¼
Z+3¼ 23.177 72.813 14¼ 72¾ 32¾ 23¼ 31½
Z+3½ 23.276 73.125 14¼ 73¼ 33¼ 23¼ 31¾
Z+3¾ 23.376 73.438 14½ 73½ 33½ 23½ 32¼
Z+4 23.475 73.75 14½ 73¾ 33¾ 23½ 32½
Z+4¼ 23.575 74.063 14¾ 74 34 23½ 32¾
Z+4½ 23.674 74.375 14¾ 74½ 34½ 23¾ 33
Z+4¾ 23.774 74.688 15 74¾ 34¾ 23¾ 33¼
Z+5 23.873 75 15 75 35 23¾ 33½
Z+5¼ 23.973 75.313 15¼ 75¼ 35¼ 24 34
Z+5½ 24.072 75.625 15¼ 75¾ 35¾ 24 34¼
Z+5¾ 24.172 75.938 15½ 76 36 24¼ 34½
Z+6 24.271 76.25 15½ 76¼ 36¼ 24¼ 34¾
Z+6¼ 24.371 76.563 15¾ 76½ 36½ 24¼ 35
Z+6½ 24.47 76.875 15¾ 77 37 24½ 35½
Z+6¾ 24.57 77.188 16 77¼ 37¼ 24½ 35¾
Z+7 24.669 77.5 16 77½ 37½ 24¾ 36

US to other sizes

US Size Diameter Circumference UK EU ISO Italy Russia Japan
0 11.63 36.537 36½ 11¾
11.833 37.175 37¼ 11¾
12.036 37.813 37¾ 12
12.24 38.452 38½ 12¼
1 12.443 39.09 39 12½
12.646 39.729 39¾ 12¾
12.849 40.367 40¼ 12¾
13.052 41.005 41 1 13
2 13.256 41.644 41¾ 13¼
13.459 42.282 42¼ 13½
13.662 42.92 43 3 13¾ 3
13.865 43.559 43½ 13¾
3 14.068 44.197 44¼ 14
14.272 44.836 44¾ 14¼
14.475 45.474 45½ 14½
14.678 46.112 H 46 6 14¾ 6
4 14.881 46.751 46¾ 15
15.084 47.389 I 47½ 15
15.288 48.027 48 8 15¼
15.491 48.666 J 48¾ 15½
5 15.694 49.304 49¼ 15¾ 9
15.897 49.943 K 50 10 16
16.1 50.581 50½ 10½ 16 10¼
16.304 51.219 L 51¼ 11¼ 16¼ 11
6 16.507 51.858 51¾ 11¾ 16½ 11½
16.71 52.496 M 52½ 12½ 16¾ 12¼
16.913 53.134 53¼ 13¼ 17 12¾
17.116 53.773 N 53¾ 13¾ 17 13¼
7 17.32 54.411 54½ 14½ 17¼ 14
17.523 55.049 O 55 15 17½ 14½
17.726 55.688 55¾ 15¾ 17¾ 15¼
17.929 56.326 P 56¼ 16¼ 18 15¾
8 18.132 56.965 57 17 18¼ 16½
18.336 57.603 Q 57½ 17½ 18¼ 17
18.539 58.241 58¼ 18¼ 18½ 17½
18.742 58.88 R 59 19 18¾ 18¼
9 18.945 59.518 59½ 19½ 19 18¾
19.148 60.156 60¼ 20¼ 19¼ 19½
19.352 60.795 60¾ 20¾ 19¼ 20
19.555 61.433 61½ 21½ 19½ 20¾
10 19.758 62.072 62 22 19¾ 21¼
10¼ 19.961 62.71 62¾ 22¾ 20 22
10½ 20.164 63.348 63¼ 23¼ 20¼ 22½
10¾ 20.368 63.987 64 24 20¼ 23
11 20.571 64.625 64¾ 24¾ 20½ 23¾
11¼ 20.774 65.263 65¼ 25¼ 20¾ 24¼
11½ 20.977 65.902 66 26 21 25
11¾ 21.18 66.54 66½ 26½ 21¼ 25½
12 21.384 67.179 67¼ 27¼ 21½ 26¼
12¼ 21.587 67.817 67¾ 27¾ 21½ 26¾
12½ 21.79 68.455 68½ 28½ 21¾ 27¼
12¾ 21.993 69.094 69 29 22 28
13 22.196 69.732 69¾ 29¾ 22¼ 28½
13¼ 22.4 70.37 Z+1¼ 70¼ 30¼ 22½ 29¼
13½ 22.603 71.009 Z+1¾ 71 31 22½ 29¾
13¾ 22.806 71.647 Z+2¼ 71¾ 31¾ 22¾ 30½
14 23.009 72.286 Z+2¾ 72¼ 32¼ 23 31
14¼ 23.212 72.924 Z+3¼ 73 33 23¼ 31¾
14½ 23.416 73.562 Z+3¾ 73½ 33½ 23½ 32¼
14¾ 23.619 74.201 Z+4¼ 74¼ 34¼ 23½ 32¾
15 23.822 74.839 Z+4¾ 74¾ 34¾ 23¾ 33½
15¼ 24.025 75.477 Z+5½ 75½ 35½ 24 34
15½ 24.228 76.116 Z+6 76 36 24¼ 34¾
15¾ 24.432 76.754 Z+6½ 76¾ 36¾ 24½ 35¼
16 24.635 77.393 Z+7 77½ 37½ 24¾ 36


Follow Us

Follow us on Facebook

Basket

Your basket is empty

Featured Items


Encaustic Art Basics - 80 Pages

Featured

£11.98


Encaustic Painting Iron - 240v 180w

Featured

£39.99


Encaustic Art Stylus Pro

Featured

£37.95


Encaustic Art Starter Set - Gift Box

Featured

£64.95