Sizing Chart

Ring Size Conversion Chart

View the chart below to see how US sizes map to finger circumference and convert to international sizes.

Each Causyou creation is masterfully sized to US standards, so every engagement ring, wedding band, and modern fashion piece—for both men and women—fits with the same impeccable harmony.

Insid

Circum

 US, Canada,
Mexico		 UK, Australia, Ireland,
New Zealand, South Africa		 France Germany, Russia,
Ukraine, Asia		 India, China, Japan,
South America, Turkey, Israel		 Italy, Spain,
Netherlands, Switzerland
IN MM
1.74 44.2 3 F 44 14 4 4
1.77 44.8 3.25 F ½ 45 14 ¼ — 4 ⅝
1.79 45.5 3.5 G 45.5 14 ½ 5 5 ¼
1.82 46.1 3.75 G ½ 46 14 ¾ 6 5 ⅞
1.84 46.8 4 H 47 15 7 6 ½
1.87 47.4 4.25 H ½ 47.5 — — 7 ⅛
1.89 48.0 4.5 I 48 15 ¼ 8 7 ¾
1.92 48.7 4.75 J 48.5 15 ½ — 8 ⅜
1.94 49.3 5 J ½ 49 15 ¾ 9 9
1.97 50.0 5.25 K 50 16 — 9 ⅝
1.99 50.6 5.5 K ½ 50.5 16 ¼ 10 10 ¼
2.02 51.2 5.75 L 51 — 11 10 ⅞
2.04 51.9 6 L ½ 52 16 ½ 12 11 ½
2.07 52.5 6.25 M 52.5 16 ¾ — 12 ⅛
2.09 53.1 6.5 M ½ 53 17 13 12 ¾
2.12 53.8 6.75 N 54 — — 13 ⅜
2.14 54.4 7 N ½ 54.5 17 ¼ 14 14
2.17 55.1 7.25 O 55 17 ½ — 14 ⅝
2.19 55.7 7.5 O ½ 56 17 ¾ 15 15 ¼
2.22 56.3 7.75 P 56.5 18 — 15 ⅞
2.24 57.0 8 P ½ 57 — 16 16 ½
2.27 57.6 8.25 Q 58 18 ¼ — 17 ⅛
2.29 58.3 8.5 Q ½ 58.5 18 ½ 17 17 ¾
2.32 58.9 8.75 R 59 18 ¾ — 18 ⅜
2.34 59.5 9 R ½ 60 19 18 19
2.37 60.2 9.25 S 60.5 19 ¼ — 19 ⅝
2.39 60.8 9.5 S ½ 61 19 ½ 19 20 ¼
2.42 61.4 9.75 T 61.5 — — 20 ⅞
2.44 62.1 10 T ½ 62 19 ¾ 20 21 ½
2.47 62.7 10.25 U 63 20 21 22 ⅛
2.49 63.4 10.5 U ½ 63.5 — 22 22 ¾
2.52 64.0 10.75 V 64 20 ½ — 23 ⅜
2.54 64.6 11 V ½ 65 20 ¾ 23 24
2.57 65.3 11.25 W 65.5 — — 24 ⅝
2.59 65.9 11.5 W ½ 66 21 24 25 ¼
2.62 66.6 11.75 X 67 21 ¼ — 25 ⅞
2.65 67.2 12 X ½ 67.5 21 ½ 25 26 ½
2.68 68.1 12.25 Y 68 — — 27 ⅛
2.71 68.5 12.5 Z 69 21 ¾ 26 27 ¾
2.72 69.1 12.75 Z ½ 69.5 — — 28 ⅜
2.75 69.7 13 — 70 22 27 29