Sizing Guidelines - Rings

Bowman Originals Ring Sizing Guidelines

Finding your perfect ring size ensures comfort, security, and beauty in wear. At Bowman Originals, each ring is handmade with heirloom quality, so we recommend the following steps to determine your best fit:

1. Measure Your Finger

  • Use a ring sizer: The most accurate method is to use a jeweler’s ring sizing tool or request a complimentary Bowman Originals sizer.
  • Measure at different times of day: Fingers can swell slightly with heat or activity. For the most accurate size, measure at the end of the day when your finger is at its largest.
  • Avoid measuring in extreme temperatures: Cold can shrink your finger size; heat can expand it.

2. Compare With a Current Ring

  • Choose a ring you already wear comfortably on the intended finger.
  • Measure the inside diameter in millimeters and compare it to a standard sizing chart.

3. Consider Ring Design & Width

  • Wider bands (over 6mm) fit more snugly; you may wish to size up by a half size.
  • Stackable rings may also feel tighter when worn together.

To measure your finger circumference at home, wrap a thin strip of paper or a piece of string around the base of your finger. Mark where it overlaps, then measure the length with a ruler in millimeters. Compare this measurement with our ring sizing chart to find your size.

Another Option:

Download Printable Ring Sizing Strip

Print at 100% scale (actual size). Cut out the strip, wrap it around the base of your finger, insert the pointed end through the slit, and read the number at the slit for your U.S. ring size.

⬇️ Download the Printable Strip (PDF)

Tip: For best accuracy, measure at the end of the day. Avoid measuring when hands are cold.

Already know your ring size internationally? Refer to the chart below to convert it to a U.S. size.

International Ring Size Conversion Chart (U.S., U.K., EU, Japan)
U.S. U.K. EU Japan Diameter (mm) Circumference (mm)
4 47 7 14.8 46.5
4.5 48 8 15.2 47.8
5 49 9 15.7 49.0
5.5 50 10 16.1 50.3
6 52 11 16.5 51.8
6.5 53 13 16.9 53.1
7 O 54 14 17.3 54.4
7.5 P 56 15 17.7 55.7
8 57 16 18.2 57.0
8.5 58 17 18.6 58.3
9 59 18 19.0 59.5
9.5 61 20 19.4 61.0
10 62 21 19.8 62.3
10.5 63 22 20.2 63.5
11 64 23 20.6 64.8
11.5 66 25 21.0 66.0
12 Y 67 26 21.4 67.5
12.5 Z 68 27 21.8 68.7