Ring Size Guide
Finding your size
Polygia standard ring sizes are US 3–9, including quarter sizes, as listed on each ring product page. Other sizes may be available by custom order (final sale) — contact us before ordering.
Tips:
- Measure late in the day when fingers are at a typical size.
- If you are between sizes, consider the larger size for wider bands.
- A local jeweler can measure your finger or an existing ring.
Conversion chart
| Inside Diameter MM | Inside Circumference MM | US / Canada | UK / Australia / South Africa | France / Germany | Europe / Italy / Spain |
|---|---|---|---|---|---|
| 14.1 | 44.2 | 3 | F | 44 | 4.25 |
| 14.5 | 45.5 | 3.5 | G | 45.5 | 5.5 |
| 14.9 | 46.8 | 4 | H | 47 | 6.75 |
| 15.3 | 48 | 4.5 | I | 48 | 8 |
| 15.7 | 49.3 | 5 | J-½ | 50 | 9.25 |
| 16.1 | 50.6 | 5.5 | K-½ | 51 | 10.5 |
| 16.5 | 51.9 | 6 | L-½ | 52 | 11.75 |
| 16.9 | 53.1 | 6.5 | M-½ | 53 | 13.25 |
| 17.3 | 54.4 | 7 | N-½ | 54 | 14.5 |
| 17.7 | 55.7 | 7.5 | O-½ | 56 | 15.75 |
| 18.1 | 57 | 8 | P-½ | 57 | 17 |
| 18.5 | 58.3 | 8.5 | Q-½ | 58 | 18.25 |
| 19 | 59.5 | 9 | R-½ | 59 | 19.5 |
| 19.4 | 60.8 | 9.5 | S-½ | 61 | 20.75 |
| 19.8 | 62.1 | 10 | T-½ | 62 | 22 |
| 20.2 | 63.4 | 10.5 | U-½ | 63 | 23.25 |
| 20.6 | 64.6 | 11 | V-½ | 64 | 24.75 |
| 21 | 65.9 | 11.5 | W-½ | 66 | 26 |
| 21.4 | 67.2 | 12 | X-½ | 67 | 27.25 |
| 21.8 | 68.5 | 12.5 | Z | 68 | 28.5 |
| 22.2 | 69.7 | 13 | Z+1 | 70 | 29.75 |
| 22.6 | 71 | 13.5 | Z+1.5 | 71 | 31 |
| 23 | 72.3 | 14 | Z+2 | 72 | 32.25 |
| 23.4 | 73.5 | 14.5 | Z+2.5 | 73.5 | 33.5 |
| 23.8 | 74.8 | 15 | Z+3 | 75 | 34.75 |
Note: Chart rows above US 9 are provided for conversion reference. Ordering sizes outside US 3–9 (or not listed on the product) is treated as a custom size and is generally final sale unless defective.