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Ring Size Guide

Ring Size Chart: Men's & Ladies' Ring Sizes in CM, US, UK & EU

Finding the right ring size makes all the difference to comfort and confidence, whether you're buying a gift, planning a proposal or treating yourself. Use this ring size chart to convert your measurement into US, UK, EU, millimetre and centimetre sizes. It covers both ladies' and men's ring sizes.

How to Use This Ring Size Chart

  1. Measure the inside diameter of a ring that fits, or the circumference of your finger. Not sure how? Follow our step-by-step guide on how to measure ring size at home.
  2. Find the closest row in the chart below, in millimetres or centimetres.
  3. Read across to your US, UK or EU size. If you're between two sizes, choose the larger one.

Ring Size Chart (CM, MM, US, UK & EU)

US / CanadaUK / AustraliaEUInside circumferenceInside diameter
3F44.244.2 mm / 4.42 cm14.1 mm / 1.41 cm
3.5G45.445.4 mm / 4.54 cm14.5 mm / 1.45 cm
4H46.746.7 mm / 4.67 cm14.9 mm / 1.49 cm
4.5I48.048.0 mm / 4.80 cm15.3 mm / 1.53 cm
5J½49.349.3 mm / 4.93 cm15.7 mm / 1.57 cm
5.5K½50.550.5 mm / 5.05 cm16.1 mm / 1.61 cm
6L½51.851.8 mm / 5.18 cm16.5 mm / 1.65 cm
6.5M½53.153.1 mm / 5.31 cm16.9 mm / 1.69 cm
7N½54.454.4 mm / 5.44 cm17.3 mm / 1.73 cm
7.5O½55.655.6 mm / 5.56 cm17.7 mm / 1.77 cm
8P½56.956.9 mm / 5.69 cm18.1 mm / 1.81 cm
8.5Q½58.258.2 mm / 5.82 cm18.5 mm / 1.85 cm
9R½59.559.5 mm / 5.95 cm18.9 mm / 1.89 cm
9.5S½60.760.7 mm / 6.07 cm19.3 mm / 1.93 cm
10T½62.062.0 mm / 6.20 cm19.7 mm / 1.97 cm
10.5U½63.363.3 mm / 6.33 cm20.1 mm / 2.01 cm
11V½64.664.6 mm / 6.46 cm20.6 mm / 2.06 cm
11.5W½65.865.8 mm / 6.58 cm21.0 mm / 2.10 cm
12Y67.167.1 mm / 6.71 cm21.4 mm / 2.14 cm
12.5Z68.468.4 mm / 6.84 cm21.8 mm / 2.18 cm
13Z+169.769.7 mm / 6.97 cm22.2 mm / 2.22 cm

EU sizes equal the inside circumference in millimetres. UK letters can vary slightly between charts at the smallest and largest sizes. If you're unsure, ask us and we'll confirm your size.

Ladies' Ring Sizes: What to Know

The chart above covers the full range of common ladies' ring sizes, but the right size depends on the ring as well as the finger:

  • Slim and stacking bands fit looser than wide ones. If you wear several rings stacked on one finger, together they fit more snugly than any one ring alone, so try the stack on together.
  • Engagement and wedding sets worn together should be sized as a pair, especially if the wedding band sits flush against a curved setting.
  • Temperature, travel and pregnancy can change finger size. Measure when your hands are at their usual size, in the afternoon at a comfortable indoor temperature.
  • Eternity bands, with diamonds all the way round, generally can't be resized, so double-check the size before ordering.

Men's Ring Sizes: What to Know

Men's rings tend to be wider and heavier, which affects fit:

  • Wide bands (over about 6 mm) fit more snugly, so consider going up a quarter to half a size.
  • Comfort-fit bands are domed inside and slide over the knuckle more easily.
  • Larger knuckles mean a ring that clears the knuckle may spin at the base of the finger. A comfort fit or sizing beads can help.

For more detail, see the men's section of our ring size guide.

Sizing Gold Rings

Getting your gold ring size right matters, because the karat affects how the ring wears and how easily it can be adjusted later:

  • 22K gold (91.6% pure) is soft. It's easy to resize but more likely to bend out of round over time, so choose a snug, secure fit.
  • 18K gold (75%) balances rich colour with durability, and it's the usual choice for diamond rings.
  • 14K gold (58.5%) is harder and keeps its shape well, but it takes a little more work to resize.
  • Chunky or wide gold bands fit more snugly than slim ones. For bands over about 6 mm, consider going up a quarter to half a size.
  • Resizing limits: plain and pavé gold bands can usually be resized by about one to two sizes. Rings with stones all the way round generally can't be.
  • Keep the hallmark: if a gold ring is resized, ask the jeweller to work away from the hallmark stamp so it stays intact.

Tips for Accurate Measurement

  • Measure the exact finger and hand the ring will be worn on. Your dominant hand is often slightly larger.
  • Measure two or three times, on different days if possible.
  • Make sure the ring will pass over your knuckle.
  • In Dubai's heat, fingers can swell by up to half a size, so avoid measuring straight after coming in from outdoors or exercising.

Frequently Asked Questions

How do I use a ring size chart?

Measure the inside diameter of a ring that fits, or the circumference of your finger, in millimetres or centimetres. Then find the closest row in the ring size chart and read across to your US, UK or EU size.

What is a ring size in cm?

A ring size in cm is the inside circumference or diameter of the ring. For example, US size 7 has an inside circumference of about 5.44 cm and a diameter of about 1.73 cm.

What if I'm between two ring sizes?

Choose the larger size, especially for wide bands or if your knuckle is larger than the base of your finger.

Visit Our Showroom

For the most accurate result, visit Daval Jewels at Unit 12, Hind Plaza Building 7, Gold Souq District, Deira, Dubai, and we'll measure your size with a professional ring gauge. Ready to choose? Browse our lab-grown diamond ring collection.

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