How to measure your ring size
Choose the method that works best for you. Both are equally accurate.
Method 1 — Measure a ring you already own
Place a ring that fits well on a flat surface. Measure the inside diameter in millimetres using a ruler. Match the result to the chart below. This is the fastest method if you own a ring that fits perfectly.
Method 2 — The string (or paper strip) method
Cut a thin strip of paper about 10cm long and 5mm wide. Wrap it around the base of the finger you plan to wear the ring on — go past the knuckle, not just the base. Mark where the strip overlaps. Measure the total length in millimetres. This is your circumference. Find it in the chart below.
US Ring Size Chart
| US Size | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|
| 3 | 14.1 mm | 44.2 mm |
| 4 | 14.9 mm | 46.8 mm |
| 5 | 15.7 mm | 49.3 mm |
| 6 | 16.5 mm | 51.9 mm |
| 7 | 17.3 mm | 54.4 mm |
| 8 | 18.2 mm | 57.0 mm |
| 9 | 18.9 mm | 59.5 mm |
| 10 | 19.8 mm | 62.1 mm |
| 11 | 20.6 mm | 64.6 mm |
| 12 | 21.4 mm | 67.2 mm |
| 13 | 22.2 mm | 69.7 mm |
Sizing tips
- Between two sizes? Go up half a size — a ring that's slightly loose is more comfortable to wear daily than one that's too tight.
- Wide bands (6 mm or more) sit snugger on the finger than a thin band of the same size. Consider going up half a size for any band wider than 5 mm.
- Time of day matters. Fingers are slightly larger in the evening and in warm weather. Measure when your hands are at a comfortable temperature — not first thing in the morning.
- Our engraving is on the inside. Inner text, dates and initials are laser-engraved on the inner surface of the band — this does not affect the fit or comfort at all.
- Unsure? Email us at contact@heirpearl.com before ordering. We'll help you choose — no commitment required.
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