A ring should sit comfortably and pass over your knuckle with slight resistance. Measure the finger you plan to wear it on. Our listed sizes use the U.S. system.
A jeweler can help confirm the fit
A professional ring sizer is a useful way to check how a size feels over your knuckle and at the base of your finger. Tell the jeweler about the width and shape of the ring you are considering. Wider bands can feel different from narrow ones.
Measure a ring that already fits
Choose a ring that fits the same finger. Measure its inside diameter in millimeters, straight across the center from inner edge to inner edge. Compare the measurement with the chart below.
Small measurement differences matter. Use a precise ruler or calipers, check more than once and treat the result as an estimate if the ring is not perfectly round.
Estimate with a strip of paper
Wrap a narrow strip of paper around the base of your finger, mark the overlap and measure the length in millimeters. This gives an estimated circumference. Make sure the loop can pass over your knuckle.
Repeat the measurement. Paper can shift and string can stretch, so confirm an uncertain result with a jeweler before ordering.
U.S. ring size chart
Measurements are approximate. Use the chart to compare your result, then confirm the fit and the sizes available on the product page.
| US size | Inside diameter (mm) | Circumference (mm) |
|---|---|---|
| 3 | 14.1 | 44.3 |
| 3.5 | 14.5 | 45.5 |
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.1 | 56.9 |
| 8.5 | 18.5 | 58.1 |
| 9 | 18.9 | 59.5 |
| 9.5 | 19.3 | 60.7 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.4 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 66.0 |
| 12 | 21.4 | 67.2 |
| 12.5 | 21.8 | 68.5 |
| 13 | 22.2 | 69.8 |
Between sizes or unsure?
Measure at room temperature when your hands are neither unusually cold nor swollen from exercise. Repeat at another time of day. If the readings disagree or your knuckle is larger than the base of your finger, email orders@lamorany.com before production begins.
If the fit needs adjusting
Choosing a standard listed size is not personalization. Eligible pieces may be returned or exchanged within 30 days of delivery under our returns policy.
Eligible Lamora rings include one complimentary resize within 12 months. Shipping for care and resizing is not included. Alterations requested after purchase can affect return terms, so contact us before arranging work.