Find Your Ring Size
The right fit matters more than anything else in a ring. Use one of the three methods below, then check your size in the chart. Not sure? Message a gemologist on WhatsApp and we'll help you choose.
Method 1 — Measure a ring you already own
- Choose a ring that fits the intended finger well.
- Measure the inside diameter, edge to edge, in millimetres.
- Find the closest diameter in the chart below.
Method 2 — Measure with string or paper
- Wrap a thin strip of paper or non-stretch string around the base of your finger.
- Mark where it overlaps. It should be snug but slide over the knuckle.
- Lay it flat and measure the length in millimetres. That's your circumference.
- Find the closest circumference in the chart below.
Method 3 — Print our ring sizer
A printable sheet with true-to-scale circles for every size and a paper strip to cut out. Print at 100% / Actual size and check the 100 mm line with a ruler before you use it.
Tips for an accurate fit
- Measure at the end of the day, when fingers are largest.
- Avoid measuring when cold — fingers shrink.
- If you have larger knuckles, measure both the base and the knuckle and choose a size in between.
- Wide bands (over 4 mm) fit tighter. Go up a half size.
- Between two sizes? Choose the larger one.
- Measure 3 times and use the average.
Ring size conversion chart
Find my size
| US | UK | EU | India | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|
| 3 | F | 44 | 4 | 14.1 | 44.2 |
| 3.5 | G | 45 | 5 | 14.5 | 45.5 |
| 4 | H | 47 | 7 | 14.9 | 46.8 |
| 4.5 | I | 48 | 8 | 15.3 | 48.0 |
| 5 | J½ | 49 | 9 | 15.7 | 49.3 |
| 5.5 | K½ | 51 | 11 | 16.1 | 50.6 |
| 6 | L½ | 52 | 12 | 16.5 | 51.9 |
| 6.5 | M½ | 53 | 13 | 16.9 | 53.1 |
| 7 | N½ | 54 | 14 | 17.3 | 54.4 |
| 7.5 | O½ | 56 | 15 | 17.7 | 55.7 |
| 8 | P½ | 57 | 16 | 18.1 | 57.0 |
| 8.5 | Q½ | 58 | 17 | 18.5 | 58.2 |
| 9 | R½ | 60 | 18 | 18.9 | 59.5 |
| 9.5 | S½ | 61 | 19 | 19.4 | 60.8 |
| 10 | T½ | 62 | 20 | 19.8 | 62.1 |
| 10.5 | U½ | 63 | 22 | 20.2 | 63.3 |
| 11 | V½ | 65 | 23 | 20.6 | 64.6 |
| 11.5 | W½ | 66 | 24 | 21.0 | 65.9 |
| 12 | Y | 67 | 25 | 21.4 | 67.2 |
| 12.5 | Z | 68 | 26 | 21.8 | 68.5 |
| 13 | Z+1 | 70 | 27 | 22.2 | 69.7 |
Most women's ring sizes fall between US 5 and 7; most men's between US 8 and 11.
Buying as a surprise?
- Borrow a ring they wear on the same finger and measure it (Method 1).
- Ask a close friend or family member.
- Choose a typical size and use our complimentary resizing (part of Lifetime Care).
Still unsure? Our gemologists will help you find the right size.
Candor Diamonds Ring Sizer
candordiamonds.com/ring-size-guide
Check this line measures exactly 100 mm. Print at 100% / Actual size, not ‘Fit to page’.
Using a ring you own: place it over the circles. The matching size is the circle that lines up with the inside edge of the ring.
Paper sizer strip: cut along the dashed line and cut the slit. Wrap the strip around the base of your finger, thread the left end through the slit, and read the US size at the slit.