Cult Mystique / Jewellery guide
Ring Size Guide
A little measuring. A better fit. Find your UK ring size and compare international sizes below.
01 / Find your size
The size chart
Circumference — the distance around the inside of a ring.
Diameter — the distance straight across the inside opening, excluding the metal.
Swipe across to see all sizes →
| Circumference mm | Diameter mm | UK Size | US Approx. | EU Approx. | Korea KS · Approx. |
|---|---|---|---|---|---|
| 40.4 | 12.85 | C | 1.5 | 40 | Below 1 |
| 41.7 | 13.26 | D | 2 | 41 | 2 |
| 42.9 | 13.67 | E | 2.75 | 42 | 3 |
| 44.2 | 14.07 | F | 3.25 | 44 | 4 |
| 45.5 | 14.48 | G | 3.75 | 45 | 5 |
| 46.8 | 14.88 | H | 4.25 | 46.5 | 7 |
| 48.0 | 15.29 | I | 4.5 | 47 | 8 |
| 48.7 | 15.49 | J | 5 | 48.5 | 8 |
| 50.0 | 15.90 | K | 5.5 | 50 | 10 |
| 51.2 | 16.31 | L | 6 | 51 | 11 |
| 52.5 | 16.71 | M | 6.5 | 52 | 12 |
| 53.8 | 17.12 | N | 6.75 | 53.5 | 13 |
| 55.1 | 17.53 | O | 7 | 55 | 15 |
| 56.3 | 17.93 | P | 7.5 | 56 | 16 |
| 57.6 | 18.34 | Q | 8 | 57 | 17 |
| 58.9 | 18.75 | R | 8.5 | 58.5 | 18 |
| 60.2 | 19.15 | S | 9 | 59.5 | 19 |
| 61.4 | 19.56 | T | 9.5 | 61 | 21 |
| 62.7 | 19.96 | U | 10 | 62.5 | 22 |
International conversions are approximate. Korean equivalents use the nearest KS size based on inside diameter. Older Korean sizing systems may differ. Compare measurements as well as your usual size.
This chart shows whole UK sizes C–U. Check each product page for available sizes and any specific fit advice.
02 / Measure at home
Not sure of your size?
Try the paper-strip method. All you need is paper, scissors, a pen and a ruler.
- 01
Cut a strip
Cut a narrow strip of non-stretch paper, about 5 mm wide. You’ll also need a pen and a ruler.
- 02
Wrap your finger
Wrap it around the base of your chosen finger. Keep it snug, without squeezing your skin.
- 03
Mark the overlap
Mark the exact point where the starting edge meets the overlapping paper.
- 04
Measure the length
Lay it flat. Measure from the starting edge to your mark in millimetres, then compare the circumference column above.
Paper can move or bend as you measure. Repeat a few times and check that the size can pass comfortably over your knuckle. For the most reliable fit, use a UK ring sizer or visit a jeweller. Illustrations are not to scale.
Already have a ring that fits?
Choose one that fits the same finger and hand. Measure straight across the centre of its inside opening, from inner edge to inner edge. Don’t include the metal band. Compare your measurement with the diameter column.
A few tips for a comfortable fit
- Measure when your hands are at a normal temperature.
- Check again at different times of day.
- Wide bands and stacked rings can feel tighter.
- Between sizes? Check the product’s fit advice or ask us before ordering.
Adjustable rings
Check the product page for the recommended size range. Adjust gently and avoid repeatedly bending the ring.