Find Your Ring Size at Home
At Factory Direct Jewelry, we believe sizing should be simple. You don’t need fancy tools to find your perfect fit — just a few household items. Use the method that works best for you, and match your measurement to our chart.
Method 1: The String or Paper Test
What you’ll need:
- A strip of paper, string, or floss
- A pen
- A ruler (millimeters are best)
Steps:
- Wrap the paper or string around the base of your finger.
- Mark the point where the ends overlap.
- Lay it flat and measure the length in millimeters.
- Compare the number to our size chart to find your ring size.
Method 2: Measure a Ring You Already Own
What you’ll need:
- A ruler or caliper
- A ring that fits comfortably
Steps:
- Place your ring on a flat surface.
- Measure the inside diameter straight across in millimeters.
- Match that measurement to the chart below.
Method 3: Use Our Printable Ring Sizer
What you’ll need:
- A printer (set to 100% scale)
- Scissors
Steps:
- Print our FDJ Ring Sizer & Chart.
- Cut along the outline to create a paper sizer.
- Wrap the paper around your finger and read the number that lines up.
Ring Size Conversion Chart
| Ring Size (US) | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 4 | 15.3 | 48.1 |
| 5 | 15.7 | 49.3 |
| 6 | 16.5 | 51.8 |
| 7 | 17.3 | 54.3 |
| 8 | 18.2 | 57.2 |
| 9 | 18.9 | 59.4 |
| 10 | 19.8 | 62.2 |
| 11 | 20.6 | 64.7 |
| 12 | 21.3 | 66.9 |
FDJ Sizing Tips
- Evening is best. Fingers are slightly larger at the end of the day, so measure then for accuracy.
- Think about width. Wider bands fit tighter — size up by half a size for anything over 4mm wide.
- Knuckle vs. base. If your knuckle is bigger, measure both and choose a size in between.
- When in doubt, size up. It’s easier to adjust a ring that’s a little loose than one that’s too tight.
How a Ring Should Fit
The perfect fit slides over your knuckle with a little resistance and rests snugly without pinching. You should be able to take it off without struggle — but it shouldn’t slip off too easily.
