Ring Size Guide

✔️ I Know My Size

Mandrel uses standard US ring sizing, you can confidently order true to size.

 

📏 Find Your Size Using a Ring You Own

  1. Pick a ring that fits the same finger.
  2. Lay it flat on top of a ruler.
  3. Measure straight across the center of the inside of the ring (inside edge to inside edge).
  4. Write down the measurement in millimeters (mm).
  5. Find your size on the chart below using the Inside Diameter (Last Column).

✏️ I Don't Know My Size

  1. Grab a ruler, pen, and a small strip of paper or string.
  2. Wrap it snugly (not too tight) around the base of your finger.
  3. Mark where the ends meet.
  4. Lay it flat and measure it in mm.
  5. Find your size on the chart below using the Inside Circumference (First Column).

📐 U.S. Ring Size Chart

Tip: Measure twice to make sure it’s accurate.
US Ring Size Inside Circumference (mm) Inside Diameter (mm)
3 44.2 14.1
3.5 45.5 14.5
4 46.8 14.9
4.5 48 15.3
5 49.3 15.7
5.5 50.6 16.1
6 51.9 16.5
6.5 53.1 16.9
7 54.4 17.3
7.5 55.7 17.7
8 57 18.1
8.5 58.3 18.5
9 59.5 18.9
9.5 60.8 19.3
10 62.1 19.7
10.5 63.4 20.1
11 64.6 20.5
11.5 65.9 20.9
12 67.2 21.3
12.5 68.5 21.7
13 69.7 22.1
13.5 71 22.5
14 72.3 22.9