How to Measure Ring Size at Home

Three easy methods to find your ring size using items you already have at home. No special tools required.

1

String or Thread Method

What you need: A piece of string, dental floss, or thin strip of paper, plus a ruler with millimeter markings.

  1. Step 1Wrap the string snugly around the base of your finger. It should be tight enough to stay in place but loose enough to slide over your knuckle.
  2. Step 2Mark the point where the string overlaps with a pen or marker.
  3. Step 3Lay the string flat against a ruler and measure the length in millimeters. This is your finger's circumference.
  4. Step 4Find the circumference in our ring size chart to determine your size.

Tip: Repeat 2-3 times and use the average measurement for best accuracy.

2

Paper Strip Method

What you need: A strip of paper (about 10mm wide and 100mm long), a pen, and a ruler.

  1. Step 1Cut a strip of paper approximately 10mm wide and at least 80mm long.
  2. Step 2Wrap the paper around your finger at the widest point (usually the knuckle). Keep it snug but comfortable.
  3. Step 3Mark where the paper overlaps, then measure the length with a ruler.
  4. Step 4Match the measurement to the circumference column in our size chart.

Tip: Use stiffer paper (like cardstock) for a more consistent wrap.

3

Existing Ring Method

What you need: A ring that fits the intended finger well, and a ruler with millimeter markings.

  1. Step 1Select a ring that fits comfortably on the finger you plan to wear the new ring on.
  2. Step 2Place the ring on a ruler and measure the inside diameter (the widest point across the inside of the ring) in millimeters.
  3. Step 3Match the diameter to the diameter column in our size chart, or use the converter.

Tip: This is the most accurate home method. Make sure the ring fits the correct finger snugly.

Tips for Accurate Measurement

  • •Measure at the right time. Fingers are smallest in cold weather and early morning. Measure in the evening at room temperature for the most accurate size.
  • •Account for knuckle size. If your knuckle is significantly larger than the base of your finger, measure both and choose a size in between.
  • •Consider the ring width. Wider bands (6mm+) feel tighter. Go up half a size for wide bands.
  • •Measure multiple times. Take 3-4 readings on different days and use the average.
  • •When in doubt, size up. It's easier to make a ring smaller than to stretch it larger.

Frequently Asked Questions

What is the most accurate way to measure ring size at home?

The most accurate home method is using a ring you already own that fits well. Measure its inner diameter with a ruler and compare to a ring size chart. The string method is the next best option.

Should I measure my ring size in the morning or evening?

Measure in the evening when your fingers are at their largest. Fingers can vary by up to half a size throughout the day due to temperature and activity.

What if my ring size is between two sizes?

Always round up to the larger size. A slightly loose ring is more comfortable than one that is too tight. You can also ask a jeweler about half sizes.

Does ring width affect the size I need?

Yes. Wider rings (over 6mm) fit more snugly, so you may need to go up by half a size. Thin bands usually fit true to size.

Can I measure someone else's ring size secretly?

Yes. Borrow a ring they wear on the intended finger and measure its inner diameter with a ruler. You can also press the ring into a bar of soap to get an impression, then measure the impression.