$1.99 USD

iPhone version

Simple and easy to use, but powerfull and accurate tool to quickly find the size of your jewelry ring. With this app you can:

Ring sizer pro supports a very wide diapason of the possible sizes. From 0000 to 16 in USA size system.

Some of the countries share the same measure system. For example USA system is also used in Canada and Mexico. If you don't find you country in the preferences try to find which country use the same system.

If you find any mistakes in the measure in you country please send me a letter and I will fix issue in the next app update. Thank you!

Available on the AppStore

Ring Sizes Table

The table below is the same that I have used in the mobile apps. It was prepared using different sources and I hope there are no many mistakes there. If you find any please let me know. You can use this table as convinient reference to convert ring sizes between different systems.

Diameter, mm Circumference, mm US/CA GB/AU EU/ISO IT/ES RU/DE JP/CN IN
9.91 31.13 0000 - - - - - -
10.72 33.68 00 - - - - - -
11.63 36.54 0 - 36 ½ - 11 ½ - -
11.84 37.20 ¼ - 37 ¼ - - - -
12.04 37.82 ½ A 37 ¾ - 12 - -
12.24 38.45 ¾ A ½ 38 ½ - - - -
12.45 39.11 1 B 39 - 12 ½ 1 -
12.65 39.74 1 ¼ B ½ 39 ¾ - - - -
12.85 40.37 1 ½ C 40 ½ 0 ½ - - -
13.06 41.03 1 ¾ C ½ 41 1 13 - 1
13.26 41.66 2 D 41 ¾ 1 ¾ - 2 2
13.46 42.28 2 ¼ D ½ 42 ¼ 2 ¼ 13 ½ - -
13.67 42.94 2 ½ E 43 3 - 3 3
13.87 43.57 2 ¾ E ½ 43 ½ 3 ½ - - 4
14.07 44.20 3 F 44 ¼ 4 ¼ 14 4 -
14.27 44.83 3 ¼ F ½ 44 ¾ 4 ¾ - 5 5
14.48 45.49 3 ½ G 45 ½ 5 ½ 14 ½ - -
14.68 46.12 3 ¾ G ½ 46 6 - 6 6
14.88 46.75 4 H 46 ¾ 6 ¾ - 7 -
15.09 47.41 4 ¼ H ½ 47 ½ 7 ½ 15 - 7
15.29 48.03 4 ½ I 48 8 - 8 8
15.49 48.66 4 ¾ J 48 ¾ 8 ¾ 15 ½ - 9
15.70 49.32 5 J ½ 49 ¼ 9 ¼ - 9 -
15.90 49.95 5 ¼ K 50 10 - - 10
16.10 50.58 5 ½ K ½ 50 ½ 10 ½ 16 10 -
16.31 51.24 5 ¾ L 51 ¼ 11 ¼ - - 11
16.51 51.87 6 L ½ 51 ¾ 11 ¾ 16 ½ 11 12
16.71 52.49 6 ¼ M 52 ½ 12 ½ - 12 -
16.92 53.15 6 ½ M ½ 53 ¼ 13 ¼ - 13 13
17.12 53.78 6 ¾ N 53 ¾ 13 ¾ 17 - -
17.32 54.41 7 N ½ 54 ½ 14 ½ - 14 14
17.53 55.07 7 ¼ O 55 15 17 ½ - 15
17.73 55.70 7 ½ O ½ 55 ¾ 15 ¾ - 15 -
17.93 56.33 7 ¾ P 56 ¼ 16 ¼ - - 16
18.14 56.99 8 P ½ 57 17 18 16 17
18.34 57.62 8 ¼ Q 57 ½ 17 ½ - - -
18.54 58.24 8 ½ Q ½ 58 ¼ 18 ¼ 18 ½ 17 18
18.75 58.90 8 ¾ R 59 19 - - 19
18.95 59.53 9 R ½ 59 ½ 19 ½ 19 18 -
19.15 60.16 9 ¼ S 60 ¼ 20 ¼ - - 20
19.35 60.79 9 ½ S ½ 60 ¾ 20 ¾ - 19 21
19.56 61.45 9 ¾ T 61 ½ 21 ½ 19 ½ - -
19.76 62.08 10 T ½ 62 22 - 20 22
19.96 62.70 10 ¼ U 62 ¾ 22 ¾ 20 21 23
20.17 63.36 10 ½ U ½ 63 ¼ 23 ¼ - 22 -
20.37 63.99 10 ¾ V 64 24 - - 24
20.57 64.62 11 V ½ 64 ¾ 24 ¾ 20 ½ 23 25
20.78 65.28 11 ¼ W 65 ¼ 25 ¼ - - -
20.98 65.91 11 ½ W ½ 66 26 - 24 26
21.18 66.54 11 ¾ X 66 ½ 26 ½ 21 - -
21.39 67.20 12 X ½ 67 ¼ 27 ¼ - 25 27
21.59 67.82 12 ¼ Y 67 ¾ 27 ¾ 21 ½ - 28
21.79 68.45 12 ½ Z 68 ½ 28 ½ - 26 -
22.00 69.11 12 ¾ Z ½ 69 29 22 - 29
22.20 69.74 13 Z+1 69 ¾ 29 ¾ - 27 30
22.40 70.37 13 ¼ - 70 ½ 30 ½ 22 ½ - -
22.61 71.03 13 ½ Z+2 71 31 - - 31
22.81 71.66 13 ¾ - 71 ¾ 31 ¾ - - 32
23.01 72.29 14 Z+3 72 ¼ 32 ¼ 23 - -
23.22 72.95 14 ¼ - 73 33 - - 33
23.42 73.57 14 ½ Z+4 73 ½ 33 ½ 23 ½ - -
23.62 74.20 14 ¾ - 74 ¼ 34 ¼ - - 34
23.83 74.86 15 Z+5 74 ¾ 34 ¾ - - 35
24.03 75.49 15 ¼ - 75 ½ 35 ½ 24 - -
24.23 76.12 15 ½ Z+6 76 ¼ 36 ¼ - - 36
24.43 76.75 15 ¾ - 76 ¾ 36 ¾ 24 ½ - -
24.64 77.41 16 Z+7 77 ½ 37 ½ - - 37