Ring Size Guide

Ring Size Guide

Finding the right ring size is essential for a comfortable fit. Use one of the three methods below to determine your size at home, then refer to our size chart to find your match.

Method 1: Measure an Existing Ring

If you already own a ring that fits the intended finger well, this is the most accurate method.

  1. Select a ring that fits comfortably on the finger you plan to wear your new ring on.
  2. Place the ring on a ruler or use a caliper to measure the inside diameter (the widest point across the interior of the ring) in millimeters.
  3. Compare your measurement to the size chart below.

Method 2: String or Paper Strip

  1. Cut a thin strip of paper or a piece of non-stretchy string approximately 10 cm (4 inches) long.
  2. Wrap it snugly around the base of the intended finger, just below the knuckle.
  3. Mark the point where the strip overlaps with a pen.
  4. Lay the strip flat and measure the length from the end to the mark in millimeters. This is your finger's circumference.
  5. Find your circumference in the size chart below.

Method 3: Printable Ring Sizer

  1. Download and print our ring sizer (ensure your printer is set to "Actual Size" or 100% scale — do not use "Fit to Page").
  2. Cut out the sizer and follow the instructions printed on it.
  3. Alternatively, place an existing ring over the printed circles to find your match.

For a printable sizer, email us at voice@carissie.com and we'll send one to you.

US Ring Size Chart

US Size Inside Diameter (mm) Circumference (mm) EU Size UK Size
5 15.7 49.3 49 J 1/2
5.5 16.1 50.6 50.5 K 1/2
6 16.5 51.9 52 L 1/2
6.5 16.9 53.1 53 M 1/2
7 17.3 54.4 54 N 1/2
7.5 17.7 55.7 56 O 1/2
8 18.1 57.0 57 P 1/2
8.5 18.5 58.3 58 Q 1/2
9 19.0 59.5 60 R 1/2
9.5 19.4 60.8 61 S 1/2
10 19.8 62.1 62 T 1/2
10.5 20.2 63.4 63.5 U 1/2
11 20.6 64.6 65 V 1/2
11.5 21.0 65.9 66 W 1/2
12 21.4 67.2 67 X 1/2

CARISSIE Size Availability

  • Women's rings: Available in US sizes 5, 6, 7, 8, and 9
  • Men's rings: Available in US sizes 8, 9, 10, 11, and 12

If you need a size outside of our standard range, please contact us and we'll do our best to accommodate your request.

Tips for Accurate Measurement

  1. Measure at the right time. Fingers swell throughout the day and in warm weather. For the most accurate reading, measure in the late afternoon when your fingers are at their largest.
  2. Measure multiple times. Take your measurement at least 2–3 times on different days to ensure consistency.
  3. Consider the band width. Wider bands (6mm+) tend to fit more snugly. If you're ordering a wide band, consider going up a half size.
  4. Account for your knuckle. If your knuckle is significantly larger than the base of your finger, measure both areas and choose a size in between for the most comfortable fit.
  5. When in doubt, go up. It's easier to have a ring sized down than to stretch one up. If you're between two sizes, choose the larger one.

Free Size Exchanges

Ordered the wrong size? No worries — CARISSIE offers free size exchanges on all rings. Simply email us at voice@carissie.com with your order number and desired size, and we'll take care of the rest. See our Return & Refund Policy for full details.