US Ring Size 5 — Complete Guide
US ring size 5 measures 15.7 mm across the inside and 49.3 mm around — that is UK J½, EU 49, and Japan and India 9. Here is the full picture: inches, neighbouring sizes, who wears it, and how to buy it without a return.
Last updated: November 2026
US size 5 at a glance
Who wears US size 5?
US 5 sits at the smaller end of the women’s range. It is a typical size for slim ring fingers and the most common size for a woman’s pinky finger. It falls below the most-bought women’s sizes (6 and 7), so ready-made ranges stock fewer pieces in a 5 — ordering ahead, or choosing a made-to-order design, is often necessary.
Not sure this is your size? Measure properly with our how to measure ring size guide, or run your millimetres through the ring size calculator.
Neighbouring sizes around US 5
| US / Canada | Diameter (mm) | Circumference (mm) | UK / Australia | EU (ISO) | Japan | India |
|---|---|---|---|---|---|---|
| 4 | 14.9 | 46.8 | H½ | 47 | 7 | 7 |
| 4.5 | 15.3 | 48.0 | I½ | 48 | 8 | 8 |
| 5 | 15.7 | 49.3 | J½ | 49 | 9 | 9 |
| 5.5 | 16.1 | 50.6 | K½ | 51 | 11 | 11 |
| 6 | 16.5 | 51.9 | L½ | 52 | 12 | 12 |
One full size either side of US 5, in half-size steps, with the US 5 row highlighted. Between rows? Take the larger size for wide bands and larger knuckles. The complete US 3–13 table is on the ring size chart.
Buying tips for size 5
- Measure the exact finger: a size 5 ring finger and a size 5 pinky are different purchases, and pinky rings are usually worn looser.
- Between 5 and 5.5? Take 5.5 for a wide band (6 mm or more) and 5 for a slim band you want to stay put.
- Small sizes resize down easily in plain gold or silver, but eternity and tension-set styles in a 5 often have to be remade — measure twice.
- Buying secretly? Size 5 is a riskier guess than 6 or 7 unless you have seen her wear a 5 — borrow a ring and measure its inside diameter instead.
Converting for an overseas seller? Use the ring size converter, and see US to UK ring size if a letter size is involved.