Ring Size Guide

Find your perfect fit with multiple measurement methods and international standards.

Finding the right ring size is crucial for comfort and wearability. We offer three primary methods to determine your ideal size. This page provides an international conversion chart, a visual step-by-step measurement guide, and essential sizing tips.

Method 1: Measure an Existing Ring

  • Select a ring that fits the intended finger perfectly.
  • Use a reliable ruler to measure the internal diameter (the space inside the ring) in millimeters.
  • Compare that measurement to the first column of the chart below.

International Conversion Chart

Use this comprehensive chart to convert between standard international sizes and diameter.

Ring Diameter (MM) USA / Canada United Kingdom France Germany Japan Switzerland
14.0 mm 3 F 44 14 4 4
14.4 mm 3½ G 45½ 14½ 5½ 6⅓
14.8 mm 4 H½ 46½ 15 7 6½
15.2 mm 4½ I½ 47¾ 15¼ 8 8
15.6 mm 5 J½ 49 15¾ 9 9½
16.0 mm 5½ L 50¾ 16 10½ 10¾
16.5 mm 6 M 51½ 16½ 12 12¾
16.9 mm 6½ N 52¾ 17 13 14
17.3 mm 7 O 54 17¼ 14 15½
17.7 mm 7½ P 55¼ 17¾ 15 16½
18.2 mm 8 Q 56¾ 18 16 17¾
18.6 mm 8½ Q½ 58 18½ 17 18½
19.0 mm 9 R½ 59¼ 19 18 20
19.4 mm 9½ S½ 60¾ 19½ 19 21
19.8 mm 10 T½ 61¾ 20 20 21¾
20.2 mm 10½ U½ 62¾ 20¼ 22 22¾
20.6 mm 11 V½ 64¼ 20¾ 23 24
21.0 mm 11½ W½ 66 21 24 25¾

Method 2: Visual Finger Measurement (DIY)

This visual guide illustrates how to determine your ring size from scratch using a simple material and a ruler.

Three-step visual ring size measurement guide: wrap finger, measure material, and read reference chart.
1.

Wrap the Material

Use a piece of non-elastic string or a strip of paper. Gently wrap it around the widest part of the finger you wish to size. The material should fit comfortably but snugly.

2.

Mark and Measure

Where the end meets the material, use a fine-tip pen or marker to clearly denote the overlap point. Then, lay the material flat on a precise ruler and measure the length between the edge and the mark (your finger's circumference) in millimeters.

*Measurement shown is for illustrative purposes only. Use your own precise reading.*
3.

Consult the Reference Chart (below)

Compare your final millimeter measurement to the special finger measurement reference chart below to determine your closest standard ring size.

Finger Measurement Reference

Use this specific chart for dimensions obtained directly from wrapping the finger (circumference in millimeters), corresponding to standard numerical ring sizes.

Circumference (mm) Ring Size Circumference (mm) Ring Size
44.2 3 59.5 9
45.5 3.5 60.8 9.5
46.8 4 62.1 10
48 4.5 63.3 10.5
49.3 5 64.6 11
50.6 5.5 65.9 11.5
51.8 6 67.2 12
53.1 6.5 68.4 12.5
54.4 7 69.7 13
55.7 7.5 71.0 13.5
56.9 8 72.3 14
58.2 8.5 73.5 14.5

Pro Sizing Tips

  • Timing is Everything: Measure your finger at the end of the day when it is most likely to be at its largest.
  • Temperature Matters: Avoid measuring when your hands are cold; fingers can shrink up to half a size.
  • Non-Stretchable Materials: Ensure your string or paper does not stretch; use a reliable, firm material for accuracy.
  • Between Sizes? If you fall between two measurements, we always recommend sizing up for a more comfortable fit.