Ring Size Chart (US, EU & UK)
Finding your perfect ring size ensures all-day comfort and security, whether you are choosing a bold statement band or a daily essential. Use our international ring size conversion chart below to easily convert between US, European (EU / ISO 8653), and British (UK / Australian) standards, with exact inside circumference and diameter measurements in millimetres and inches.
| US | EU | UK | Circumference | Diameter |
|---|---|---|---|---|
| 6 | 52 | L | 51.9 mm (2.0 in) | 16.5 mm (0.7 in) |
| 7 | 54 | N | 54.4 mm (2.1 in) | 17.3 mm (0.7 in) |
| 8 | 57 | P | 57.0 mm (2.2 in) | 18.1 mm (0.7 in) |
| 9 | 60 | R | 59.5 mm (2.3 in) | 18.9 mm (0.7 in) |
| 10 | 62 | T | 62.1 mm (2.4 in) | 19.8 mm (0.8 in) |
| 11 | 65 | V | 64.6 mm (2.5 in) | 20.6 mm (0.8 in) |
| 12 | 67 | X | 67.2 mm (2.6 in) | 21.4 mm (0.8 in) |
| 13 | 70 | Z | 69.7 mm (2.7 in) | 22.2 mm (0.9 in) |
* Note: UK sizes are approximate (± half size) as traditional letter sizes do not correspond directly to 1 mm increments.
How to Measure Your Ring Size at Home
Measuring your ring size at home is simple and accurate when done correctly. Try one of these three easy methods:
Method 1: String or Paper Tape Around the Finger
Wrap a non-stretchy string, flexible measuring tape, or a thin strip of paper around the base of the finger you plan to wear the ring on. Make sure it fits comfortably over your knuckle.
- Mark the exact spot where the paper or string overlaps with a pen.
- Lay the string or strip flat against a ruler with millimeter markings.
- Measure the exact length in millimeters to find your circumference, then match it to the chart above.
Method 2: Measure an Existing Ring's Inside Diameter
If you already have a ring that fits the target finger comfortably:
- Place your ring flat on top of a ruler with millimeter markings.
- Measure the straight internal distance across the widest point of the ring (inside diameter), excluding the metal band itself.
- Compare your diameter in millimeters to the Diameter column in the table above.
Method 3: Visit a Local Jeweller
For complete peace of mind, visit any reputable local jeweller. Most jewellery stores will gladly size your finger for free using calibrated metal sizing rings and mandrels. A jeweller can also factor in band width and personal comfort.
Between Sizes?
If your measurement sits between two sizes, we always advise choosing the larger size. Wider bands (such as 6 mm or wider statement rings) fit more tightly against the skin than narrow delicate bands, so sizing up ensures comfort. In addition, fingers naturally fluctuate in circumference throughout the day, expanding slightly in warm temperatures or in the evening.
Ready to Find Your Ring?
Discover our collection of premium 316L stainless steel rings — waterproof, rust-proof, and designed to make a statement.
Frequently Asked Questions
How do I measure my ring size at home?
Wrap a piece of string or a thin strip of paper around the base of your finger, mark where it overlaps, then measure the length in millimetres. Match that measurement to the circumference column in the chart above.
What is my EU ring size?
EU ring sizes follow ISO 8653, where the size equals the inside circumference of the ring in millimetres. For example, a US size 9 with a 59.5 mm circumference is an EU 60.
What is my UK ring size?
UK and Australian sizes use letters. Find your circumference in millimetres in the chart above and read across to the UK column. UK sizes are approximate and can vary by up to half a size between jewellers.
What if I am between two sizes?
Choose the larger size, especially for wider bands, which fit more tightly than thin bands. Your fingers can also swell slightly in warm weather or later in the day.
Does the ring style affect the size I should choose?
Yes. Wide or chunky bands feel tighter, so size up if you are between sizes. Thin bands sit closer to your measurement.
Are stainless steel rings sized the same as other rings?
Yes. Sizing is based on the inside circumference of the ring, so a US 9 stainless steel ring fits the same finger as any other US 9 ring.