Sizing

A well‑fitting ring should resist sliding over the knuckle, yet remove without pain. Sizing can be exacting but we offer clear paths to help you find yours.

For the most accurate fit, visit a jeweler. Try various rings or bring your own. Sizing standards include US, UK/AUS, EU, and Japanese. Always measure the specific finger and do so at a warm temperature, when hands are most natural in size.

Place a well‑fitting ring over a ruler, measuring its inner diameter at the widest point. Alternatively, wrap string just below your knuckle, mark, and measure. If between sizes, we suggest choosing the larger one.

Ring sizing example

Ring sizing example — this ring measures 19 mm in inside diameter.

Every order includes our ring sizer. Insert the end through the buckle, tighten it over the knuckle, and slide it to the base. Read the size at the arrow. Unsure? Email a photo to hola@sarjewellery.com for guidance.

You can also order a ring sizer on its own, free of charge:

Order Free Ring Sizer Ring sizer example

Alternatively, you can print our guide to explore more methods for finding your ring size at home.

Download Size Guide (PDF)

*I.D. – Internal Diameter
*I.CIRC. – Internal Circumference

I.D. MM* I.C. MM* US UK / AUS JAPAN FRENCH
15.6 49.01 5 J½ 9 50½
15.8 49.64 5¼ K 10 51
16.0 50.27 5½ K½ 10½ 52
16.2 50.91 5¾ L 11 52½
16.4 51.55 6 L½ 12 53
16.6 52.18 6¼ M 12½ 54
16.8 52.81 6½ M½ 13 54½
17.0 53.44 6¾ N 14 55
17.2 54.08 7 N½ 14½ 55½
17.4 54.72 7¼ O 15 56
17.6 55.35 7½ O½ 16 57
17.8 55.99 7¾ P 16½ 58
18.0 56.63 8 P½ 17 58½
18.2 57.26 8¼ Q 18 59
18.4 57.89 8½ Q½ 18½ 60
18.6 58.52 8¾ R 19 61
18.8 59.15 9 R½ 20 61½
19.0 59.78 9¼ S 20½ 62
19.2 60.42 9½ S½ 21 63
19.4 61.06 9¾ T 22 64
19.6 61.69 10 T½ 22½ 64½
19.8 62.33 10¼ U 23 65
20.0 62.96 10½ U½ 24 66
20.2 63.60 10¾ V 24½ 66½
20.4 64.24 11 V½ 25 67
20.6 64.88 11¼ W 26 68
20.8 65.50 11½ W½ 26½ 68½
21.0 66.13 11¾ X 27 69
21.2 66.77 12 X½ 28 70