Size guide
Your exact size, made to measure
Every made-to-order ring is crafted in your size. Use Fernando Piero's official ring sizer: print it, measure at home in a minute, and choose your US size when you order.
The FPJ ring sizer
Download the ring sizer
A printable template with one circle for each US size. It's the most accurate way to find your size at home, with no special tools.
Print at 100% (actual size): in the print dialog, turn off "Fit to Page" or any scaling. A scaled page gives the wrong size.
How to measure
Two simple steps
Using the printed sizer and a ring you already wear on that finger:
- 01Place the ring over the printed circles and find the one whose outline matches the ring's inner edge.
- 02The number in that circle is your US ring size. International equivalents exist; if you use another scale, we'll help you convert it.
Reference table
US size and interior diameter
The US sizes we work in and their interior diameter in millimeters: the distance from one inner edge to the other.
| US size | Interior diameter (mm) |
|---|---|
| 4 | 14.88 |
| 5 | 15.70 |
| 6 | 16.51 |
| 7 | 17.32 |
| 8 | 18.14 |
| 9 | 18.95 |
| 10 | 19.76 |
| 11 | 20.57 |
| 12 | 21.39 |
| 13 | 22.20 |
Not sure?
We make it to your size
Every made-to-order piece is crafted in your size. If you're unsure, message us and an advisor will confirm it with you before we begin.