Ring Size Chart: How to Measure Your Ring Size at Home (US, UK, EU)
Chic and Bling 4 min read- Measure the base of your finger, in the evening, three times, and take the average.
- Use the chart below to convert millimetres into a US, UK or EU ring size.
- Wide bands need about half a size more than thin bands.
- Buying a gift and unsure? Choose an adjustable ring.
Ring size chart (US, UK, EU)
Find your measurement in the middle columns, then read across to your size. Sizes are standard conversions; check a brand's own guide if it gives one.
Inner diameters drawn in proportion to each other. Screens vary, so use the chart, not this picture, to size.
| US | UK / AU | EU | Inner diameter | Inner circumference |
|---|---|---|---|---|
| 4 | H | 47 | 14.8 mm | 46.5 mm |
| 5 | J½ | 49 | 15.7 mm | 49.3 mm |
| 6 | L½ | 52 | 16.5 mm | 51.9 mm |
| 7 | N½ | 54 | 17.3 mm | 54.4 mm |
| 8 | P½ | 57 | 18.1 mm | 57.0 mm |
| 9 | R½ | 59 | 18.9 mm | 59.5 mm |
| 10 | T½ | 62 | 19.8 mm | 62.1 mm |
How to measure your ring size at home
Method 1: String or paper strip (most accurate at home)
Method 2: Measure a ring you already own
Pick a ring that fits the right finger well. Place it on a ruler and measure the inside width from edge to edge in millimetres, then match it to the diameter column. This only works if the ring is round and not worn out of shape.
Method 3: Print a ring sizer or ask a jeweller
A printable ring sizer works if you print it at 100% scale, with no “fit to page”. A local jeweller can size you for free in under a minute.
Tips for an accurate size
- Measure in the late afternoon or evening.
- Measure three times and average the result.
- Check that the ring can slide over your knuckle and still feel snug at the base.
- Go up half a size for wide bands.
- Measuring when your hands are cold, wet or swollen.
- Using a stretched or worn old ring as the guide.
- Pulling the string tight; it should sit snug but not squeeze.
- Guessing a gift size from someone else's different finger.
Buying a ring as a gift
If you cannot check the size, an adjustable ring removes the guesswork. It opens and closes to fit a range of finger sizes. Browse the adjustable rings collection or start with these favourites:
