Printable ring sizer
Free PDF with calibration line, ring circles, and international size table.
Print at 100% scale. At-home sizing is approximate and should be confirmed for valuable orders.
Print check
50 mm calibration
US 3.5
14.5 mm
US 4
14.9 mm
US 4.5
15.3 mm
US 5
15.7 mm
US 5.5
16.1 mm
Print instructions
- Download the PDF and print it at 100% scale.
- Disable fit-to-page or shrink-to-fit in the print dialog.
- Check the 50 mm calibration line with a ruler.
- Place a fitting ring over the circles and match the inside edge.
If the calibration line is not exactly 50 mm after printing, reprint without scaling before using the circles.
Printable size table
The PDF includes these reference sizes for US, UK, EU, and JP systems.
| US | UK | EU | JP | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|
| 3 | F | 44 | 4 | 14.1 | 44.3 |
| 3.5 | G | 46 | 6 | 14.5 | 45.6 |
| 4 | H | 47 | 7 | 14.9 | 46.8 |
| 4.5 | I | 48 | 8 | 15.3 | 48.1 |
| 5 | J | 49 | 9 | 15.7 | 49.3 |
| 5.5 | K | 51 | 10 | 16.1 | 50.6 |
| 6 | L | 52 | 12 | 16.5 | 51.8 |
| 6.5 | M | 53 | 13 | 16.9 | 53.1 |
| 7 | N | 54 | 14 | 17.3 | 54.3 |
| 7.5 | O | 56 | 15 | 17.7 | 55.6 |
| 8 | P | 57 | 16 | 18.1 | 56.9 |
| 8.5 | Q | 58 | 18 | 18.5 | 58.1 |
| 9 | R | 60 | 19 | 19.0 | 59.7 |
| 9.5 | S | 61 | 20 | 19.4 | 60.9 |
| 10 | T | 62 | 21 | 19.8 | 62.2 |
| 10.5 | U | 64 | 23 | 20.2 | 63.5 |
| 11 | V | 65 | 24 | 20.6 | 64.7 |
| 11.5 | W | 66 | 25 | 21.0 | 66.0 |
| 12 | X | 67 | 26 | 21.4 | 67.2 |
| 12.5 | Y | 69 | 27 | 21.8 | 68.5 |
| 13 | Z 1/2 | 70 | 29 | 22.2 | 69.7 |