Ring Size Guide
CYCOLINKS · RING SIZING
Find your ring size.
Our rings use US sizes. Measure the finger you’ll wear it on, then match your measurement below. Available sizes vary by ring.
1. Choose a measuring method
Measure straight across its centre, from inside edge to inside edge. Match this to inside diameter in the chart.
Use a ring worn on the same finger and hand.
Wrap a narrow strip of paper or non-stretch string around its base. Mark where the ends meet, then lay it flat and measure to the mark. Match to circumference.
Use millimetres for ring measurements: 10 mm = 1 cm. Don’t pull the paper or string tight. This method gives an estimate—repeat it to check.
Our adjustable ring sizer lets you check a comfortable fit and whether it passes over your knuckle.
Get the ring sizer tool ↗2. Match to your US size
| US size |
UK approx. |
Inside diameter (mm) |
Circumference (mm) |
|---|---|---|---|
| 5 | J½ | 15.7 | 49.3 |
| 6 | L½ | 16.5 | 51.9 |
| 7 | N½ | 17.3 | 54.4 |
| 8 | P½ | 18.1 | 57.0 |
| 9 | R½ | 18.9 | 59.5 |
| 10 | T½ | 19.8 | 62.1 |
| 11 | V½ | 20.6 | 64.6 |
| 12 | Y | 21.4 | 67.2 |
| 13 | Z+1 | 22.2 | 69.7 |
| 14 | Z+3 | 23.0 | 72.3 |
| 15 | Z+5 | 23.8 | 74.8 |
Measurements and UK conversions are approximate. Order by US size and check the available options on your ring’s product page.
Check the knuckle, too. A ring should feel secure at the base of your finger and slide over the knuckle with gentle resistance. If you’re between sizes, or choosing a wide band, use a ring sizer or ask us before ordering.
A few tips for a more reliable fit
- Measure when your hands are at a normal, comfortable temperature, ideally later in the day. Avoid measuring just after exercise or when your fingers are unusually cold or swollen.
- Check two or three times. Different fingers—and the same finger on the other hand—can need different sizes.
- Wider bands can feel tighter than narrow ones. Check the individual ring’s fit notes rather than automatically adding a full size.
- Buying a gift? Use a ring that fits the intended finger or check the size with the wearer. A guessed size is less reliable.