Ring Size Conversion: US, UK and EU
Find your perfect fit, wherever you are from
Ring sizes are measured differently around the world. If you know your size at home, this guide helps you find the same fit at ANANTA in Bangkok.
1. How Ring Sizes Work
- US and Canada: numbers, such as 6 or 6.5
- UK and Australia: letters, such as L or M
- Europe and Thailand: the inner circumference in millimetres, such as 52
ANANTA uses the millimetre system, so your EU size is your ANANTA size.
2. Ring Size Conversion Chart
| US | UK / AU | EU / ANANTA | Circumference (mm) | Diameter (mm) |
|---|---|---|---|---|
| 4 | H½ | 47 | 46.8 | 14.9 |
| 4.5 | I½ | 48 | 48.0 | 15.3 |
| 5 | J | 49 | 49.3 | 15.7 |
| 5.5 | K½ | 51 | 50.6 | 16.1 |
| 6 | L½ | 52 | 51.9 | 16.5 |
| 6.5 | M½ | 53 | 53.1 | 16.9 |
| 7 | N½ | 54 | 54.4 | 17.3 |
| 7.5 | P | 56 | 55.7 | 17.7 |
| 8 | Q | 57 | 57.0 | 18.1 |
| 8.5 | R | 58 | 58.3 | 18.6 |
| 9 | S | 59 to 60 | 59.5 | 18.9 |
| 9.5 | T | 61 | 60.8 | 19.4 |
| 10 | U | 62 | 62.1 | 19.8 |
Circumference and diameter are in millimetres. Sizes are rounded to the nearest ANANTA size. For a size outside this chart, our team will be happy to help.
3. Measure at Home
Measure the inner diameter of a ring that fits you well, or wrap a strip of paper around your finger and measure its length in millimetres.
Measure at the end of the day, when your fingers are slightly larger.
ANANTA Tip: If you fall between two sizes, choose the larger one. A wide band may also feel snugger, so it is best to try it on.
4. Try It On in Bangkok
The most accurate way is to try your ring on at one of our five Bangkok boutiques. Our team will measure your finger and recommend the best fit.
If an in-stock ring needs resizing within its adjustable range, we can complete it in about 3 hours.
Living in Thailand? We can send you a complimentary ring sizer to try at home. Simply contact us via chat.
ANANTA Tip: Gold and platinum rings include two complimentary resizings within two years, subject to conditions.
The Perfect Fit, Made Simple
Send us your size on WhatsApp before your visit, and we will prepare rings in your size for you to try.
Treasure your moment. Begin with brilliance. Begin with ANANTA.
Written by ANANTA Expert: our team of specialists with decades of experience in fine jewelry and gemology.
Each contributor is a certified Gemologist from leading institutes, including GIA and GIT, combining academic rigor with hands-on expertise. Every article is crafted with accuracy, care, and passion, offering you trusted guidance to understand diamonds and jewelry more deeply. With ANANTA Expert, you can be confident that every insight reflects knowledge refined by both heritage and global standards.
Last updated: 28/10/2026