Two ways to measure
01
Use a string or strip
- Wrap a thin strip of paper or string around the base of your finger
- Mark where it overlaps
- Lay it flat and measure the length in mm
- This is your circumference — match it to the table below
02
Measure an existing ring
- Take a ring that fits the correct finger well
- Measure the inner diameter in mm
- Match the diameter to the table below
- If between sizes, choose the larger one
Printable ring sizer
Print this page at 100% scale (no scaling). Place your existing ring over each circle until it matches the inner edge perfectly.
14 mm
Size 5
Size 5
15 mm
Size 6
Size 6
16 mm
Size 7
Size 7
17 mm
Size 8
Size 8
18 mm
Size 9
Size 9
19 mm
Size 10
Size 10
20 mm
Size 11
Size 11
Ring size conversion chart
| Indian Size | Diameter (mm) | Circumference (mm) | US / Canada | UK / Australia |
|---|---|---|---|---|
| 4 | 13.5 | 42.4 | 3 | F |
| 5 | 14.0 | 44.0 | 3½ | G |
| 6 | 14.5 | 45.5 | 4 | H |
| 7 | 15.0 | 47.1 | 4½ | I½ |
| 8 | 15.5 | 48.7 | 5 | J½ |
| 9 | 16.0 | 50.3 | 5½ | K½ |
| 10 | 16.5 | 51.8 | 6 | L½ |
| 11 | 17.0 | 53.4 | 6½ | M½ |
| 12 | 17.5 | 54.9 | 7 | N½ |
| 13 | 18.0 | 56.5 | 7½ | O½ |
| 14 | 18.5 | 58.1 | 8 | P½ |
| 15 | 19.0 | 59.7 | 8½ | Q½ |
| 16 | 19.5 | 61.3 | 9 | R½ |
| 17 | 20.0 | 62.8 | 9½ | S½ |
| 18 | 20.5 | 64.4 | 10 | T½ |
Good to know
Time of day matters
Fingers are slightly larger in the evening and in warm weather. Measure at the end of the day for the most accurate fit.
Knuckle vs base
If your knuckle is larger than the base, measure both and choose a size that slides over the knuckle comfortably.
Wider bands fit tighter
A wider band sits higher on the finger and can feel snug. Go half a size up for bands wider than 6 mm.