Ring Size Guide
Find your US ring size at home in a few minutes, with a ruler, a ring you already own, or our printable sizer.
Three ways to measure
- Use a ring you own. Print the sizer below, then lay a ring that fits the right finger on the circles. The right size is the circle whose line sits just inside the ring's inner edge. No printer? Measure the inside diameter of the ring in millimetres and match it to the chart.
- Use the paper strip. Print the sizer, cut out the strip, and wrap it around the base of your finger with the numbers facing out. Where the end meets the strip, read your size on the purple marks (or read the millimetres and match the circumference in the chart).
- Use string or floss. Wrap a piece of string or dental floss snugly around the base of your finger, mark where it overlaps, then lay it flat on a ruler and measure the length in millimetres. Match that circumference to the chart.
On a phone or screen the sizes are not to scale. Print at 100% (“Actual size”, not “Fit to page”) and check the 50 mm line with a ruler before you measure.
Tips for an accurate fit
- Measure at the end of the day, when fingers are at their largest.
- Make sure your hands are warm. Cold fingers can measure half a size small.
- The ring needs to slide over your knuckle. If your knuckle is wider, measure there too and choose between the two.
- Wide bands fit tighter. For a band wider than about 6 mm, go up half a size.
- Between two sizes? Choose the larger one.
- Measure two or three times for the best result.
Eternity bands cannot be resized once crafted, so please confirm your size carefully before placing your order.
US ring size chart
| US size | Inside diameter | Circumference |
|---|---|---|
| 3 | 14.1 mm | 44.2 mm |
| 3.5 | 14.5 mm | 45.5 mm |
| 4 | 14.9 mm | 46.8 mm |
| 4.5 | 15.3 mm | 48.0 mm |
| 5 | 15.7 mm | 49.3 mm |
| 5.5 | 16.1 mm | 50.6 mm |
| 6 | 16.5 mm | 51.9 mm |
| 6.5 | 16.9 mm | 53.1 mm |
| 7 | 17.3 mm | 54.4 mm |
| 7.5 | 17.7 mm | 55.7 mm |
| 8 | 18.1 mm | 57.0 mm |
| 8.5 | 18.5 mm | 58.2 mm |
| 9 | 18.9 mm | 59.5 mm |
| 9.5 | 19.4 mm | 60.8 mm |
| 10 | 19.8 mm | 62.1 mm |
Still unsure?
Message us and we'll help. Email zagadiamonds@gmail.com or send us a message.
Print at 100% / “Actual size”. Check your printer scale: this line should measure exactly 50 mm.
1 · Ring circles (US sizes 4 to 9)
Place a ring that fits on the circles. Your size is the circle whose line sits just inside the ring.
2 · Paper strip sizer
Cut along the dashed line. Wrap snugly around the base of your finger, numbers facing out, with the gold start line at the end. Read the size where the strip overlaps the start line.
Questions? zagadiamonds@gmail.com · zagadiamonds.com (http://zagadiamonds.com/)