How to Measure Your Ring Size

Finding the perfect ring fit is easier than you think — and we’re here to guide you every step of the way. At AZURR, we use Hong Kong ring sizes as our standard.
If you're more familiar with US, UK, or other international sizes, scroll down for our conversion chart.

Option 1: Measure a Ring You Already Own

  1. Choose a ring that fits the desired finger.
  2. Measure the inner diameter (straight across the center) using a ruler.
  3. Match it with the Hong Kong size in our chart below.

Tip: Use a ring that’s perfectly round and not bent out of shape.

Option 2: Use a Paper or String

What you'll need:

  • A thin strip of paper or non-stretchy string
  • A pen
  • A ruler

Steps:

  1. Wrap the strip around the base of your finger.
  2. Mark where the ends meet.
  3. Measure the length in millimeters.
  4. Use the circumference column in our chart to find your size.

Best to measure at the end of the day when your fingers are naturally a bit larger.

International Ring Size Conversion Chart

HK Size Diameter (mm) Circumference (mm) US UK EU Japan
9 15.6 49.0 5 J½ 49 9
10 15.9 50.0 5¼ K 50 10
11 16.2 51.0 5¾ L 51 11
12 16.5 52.0 6 M 52 12
13 16.8 53.0 6¼ M½ 53 13
14 17.1 54.0 6¾ N½ 54 14
15 17.4 55.0 7 O 55 15
16 17.8 56.0 7½ P 56 16
17 18.1 57.0 8 P½ 57 17
18 18.4 58.0 8¼ Q½ 58 18
19 18.7 59.0 8¾ R½ 59 19
20 19.0 60.0 9 S 60 20

*Note: Sizes may vary slightly based on ring style or band thickness.

📌 Still Unsure?

We’re happy to help! You can:

  • Visit our store for an in-person fitting.
  • Chat with us on Instagram or WhatsApp.

💡 Quick Tips

  • Measure your finger when it’s warm — fingers shrink when cold.
  • If you’re between two sizes, choose the larger one.
  • For wider bands, size up slightly for comfort.

The right fit makes all the difference. Let’s find yours.