Before you measure
Dimensions and fit can vary by design. Always check the measurements and available sizes on the individual product page before ordering. Measure in millimeters for the most consistent comparison.
Measure an existing ring
- Choose a ring that fits the intended finger comfortably.
- Measure the inside diameter straight across the center, from inner edge to inner edge.
- Find the closest diameter in the conversion chart below.
Measure your finger
- Wrap a non-stretch string or narrow strip of paper around the base of your finger.
- Mark where the ends meet, then lay it flat.
- Measure the marked length in millimeters and compare it with the circumference column below.
Ring size conversion chart
| US | Diameter (mm) | Diameter (in) | Circumference (mm) | Circumference (in) | UK | EU | Asia |
|---|---|---|---|---|---|---|---|
| 4 | 14.8 | 0.58 | 46.8 | 1.84 | H | 46 | 7 |
| 5 | 15.7 | 0.62 | 49.3 | 1.95 | J | 50 | 9 |
| 6 | 16.5 | 0.65 | 51.9 | 2.05 | L | 52 | 11 |
| 7 | 17.3 | 0.69 | 54.4 | 2.15 | N | 54 | 14 |
| 8 | 18.1 | 0.72 | 57.0 | 2.25 | P | 57 | 16 |
| 9 | 19.0 | 0.75 | 59.5 | 2.35 | R | 60 | 18 |
| 10 | 19.8 | 0.78 | 62.1 | 2.45 | T | 62 | 20 |
This chart is a reference conversion. If a product page gives different item-specific sizing information, follow the product page.
Fit tips
- Measure more than once and at room temperature.
- Finger size can change during the day; measuring in the evening can give a more comfortable fit.
- If you are between two sizes, choose the larger size.
Bracelets and cuffs
Wrap a flexible measuring tape around the wrist where the piece will sit, with your palm open and facing upward. Record the wrist circumference in centimeters and round to the nearest centimeter. If you do not have a measuring tape, use a non-stretch string or strip of paper, mark where the ends meet, lay it flat and measure it with a ruler.
| Wrist circumference (cm) | Wrist circumference (in) |
|---|---|
| 13 | 5.12 |
| 14 | 5.51 |
| 15 | 5.91 |
| 16 | 6.30 |
| 17 | 6.69 |
| 18 | 7.09 |
| 19 | 7.48 |
| 20 | 7.87 |
Use this measurement to check the bracelet's listed length or adjustable range. Fit allowance and cuff openings vary by design, so the measurements on the product page take priority.
Necklace length guide
| Length | Centimeters | Inches | Typical position |
|---|---|---|---|
| Choker | 34–38 | 13–15 | Close to the base of the neck |
| Short | 38–42 | 15–16.5 | At or near the collarbone |
| Mid | 42–46 | 16.5–18 | Just below the collarbone |
| Long | 46–50 | 18–20 | Upper chest |
Body proportions, neck circumference and pendant size affect where a necklace sits. Check the total chain length and any extender length on the product page.
If you are unsure, contact support@mattermotiontech.com before ordering and include the product name and your measurement.