To find your ring size at home, wrap a strip of paper snugly around the base of your finger, mark where it overlaps, and measure that length in millimetres — that is your circumference. A 54.4 mm circumference is a US 7, EU 54 and India 14. The full conversion chart is below, along with a second method using a ring you already own.
Method 1: measure your finger
- Cut a thin strip of paper or take a length of string, roughly 8 to 10 cm long.
- Wrap it around the base of the finger you intend to wear the ring on. It should be snug — firm enough not to slide, loose enough to turn.
- Mark the point where the strip overlaps itself, then lay it flat against a ruler and read the length in millimetres.
- That measurement is your finger circumference. Find the closest value in the chart below to get your size.
Method 2: measure a ring you already own
- Choose a ring that fits the same finger well.
- Lay it flat and measure straight across the inside of the band, edge to edge through the centre, in millimetres.
- That is the inside diameter. Match it to the diameter column in the chart below.
- A ring measuring 17.3 mm across the inside is a US 7.
International ring size conversion chart
| US / Canada | UK / Australia | EU | India / Asia | Inside diameter | Circumference |
|---|---|---|---|---|---|
| US 5 | J 1/2 | 49 | 9 | 15.7 mm | 49.3 mm |
| US 6 | L 1/2 | 51.5 | 12 | 16.5 mm | 51.8 mm |
| US 7 | N 1/2 | 54 | 14 | 17.3 mm | 54.4 mm |
| US 8 | P 1/2 | 56.5 | 16 | 18.1 mm | 56.9 mm |
| US 9 | R 1/2 | 59 | 18 | 18.9 mm | 59.5 mm |
| US 10 | T 1/2 | 61.5 | 20 | 19.8 mm | 62.1 mm |
Getting an accurate measurement
- Measure at the end of the day. Fingers are at their smallest in the morning and swell slightly as the day goes on.
- Do not measure when your hands are cold — cold fingers can read a full size small.
- Measure the specific finger and the specific hand you will wear the ring on. Dominant hands are usually very slightly larger.
- Check that your measurement clears your knuckle. If the knuckle is noticeably wider than the base of the finger, size to the knuckle so the ring can get on and off.
- Take the measurement two or three times and use the largest reading.
If you are between sizes
Size up. A ring that is fractionally loose can be worn all day; a ring that is fractionally tight becomes uncomfortable by the afternoon and is difficult to remove when fingers swell in heat. Band width matters too: a wide band sits against more of the finger and feels tighter than a narrow band of the same nominal size, so if you are choosing a broad or domed band and sit between sizes, going up is the safer choice.
Bracelets, cuffs and bangles
Wrist measurements work the same way: wrap a strip of paper around your wrist just below the wrist bone, mark the overlap, and measure it in millimetres. Open cuffs and open bangles are more forgiving than closed forms because the opening can be eased very slightly to sit correctly — adjust gently and gradually with both hands rather than flexing a piece sharply, which stresses the metal and can mark the finish at the bend.
If the size is not right
Avirena offers a 5-day return and exchange window from delivery for unworn pieces in their original packaging, so a size exchange is straightforward if your measurement was off. Full details are on our policies page.
Common Questions
How do I measure my ring size at home?
Wrap a thin strip of paper or a length of string around the base of the finger you will wear the ring on, snug enough that it will not slide but loose enough to turn. Mark the point where it overlaps, lay it flat against a ruler, and read the length in millimetres — that is your finger circumference, which you can match to a size chart. A circumference of 54.4 mm is a US 7, EU 54 and India 14. Alternatively, take a ring that already fits that finger, lay it flat, and measure straight across the inside of the band through the centre: 17.3 mm across is also a US 7. Measure at the end of the day, when fingers are at their largest.
What should I do if I am between two ring sizes?
Size up. A ring that is very slightly loose stays comfortable all day, while one that is very slightly tight becomes uncomfortable by the afternoon and can be difficult to remove when fingers swell in heat or humidity. Band width matters as well: a wide or domed band contacts more of the finger and wears tighter than a narrow band of the same nominal size, so with a broader design the larger size is the safer choice. It is also worth checking that your chosen size clears your knuckle — if the knuckle is noticeably wider than the base of the finger, size to the knuckle so the ring can be put on and taken off.
What ring size is 54 mm?
A finger circumference of about 54 mm corresponds to a US size 7, a UK size N 1/2, an EU size 54 and an India size 14. Measured the other way, that is an inside band diameter of roughly 17.3 mm. For reference on either side of it: 51.8 mm circumference (16.5 mm diameter) is a US 6, EU 51.5 and India 12, while 56.9 mm circumference (18.1 mm diameter) is a US 8, EU 56.5 and India 16. If your measurement falls between two rows on a conversion chart, choose the larger size, particularly for a wide or domed band, which sits against more of the finger and feels tighter than a narrow one.