Two minutes with a strip of paper now saves three weeks later. Everything here is made after you order, so a size change afterwards means starting again.
Rings
We number our ring sizes. Whatever the size, the number in the circumference column is the one that has to match your finger — the UK letter and the EU number are there so you can compare with a ring you bought somewhere else.
Measure a ring you already own
The most reliable method. Take a ring that fits the finger you have in mind, lay it flat, and measure straight across the inside edge to edge in millimetres. That is the inside diameter.
| Ring size | Inside circumference | Inside diameter | UK | EU |
| 4.5 | 48.0 mm | 15.3 mm | J | 48 |
| 5 | 49.3 mm | 15.7 mm | K | 49 |
| 5.5 | 50.6 mm | 16.1 mm | L | 50 |
| 6 | 51.9 mm | 16.5 mm | M | 52 |
| 6.5 | 53.1 mm | 16.9 mm | N | 53 |
| 7 | 54.4 mm | 17.3 mm | O | 54 |
| 7.5 | 55.7 mm | 17.7 mm | P | 56 |
| 8 | 57.0 mm | 18.1 mm | Q | 57 |
| 8.5 | 58.3 mm | 18.5 mm | R | 58 |
| 9 | 59.5 mm | 18.9 mm | S | 60 |
| 9.5 | 60.8 mm | 19.4 mm | T | 61 |
| 10 | 62.1 mm | 19.8 mm | U | 62 |
Measure your finger
Cut a strip of paper about 5 mm wide. Wrap it round the base of the finger, snug but not tight — it should slide over the knuckle with a little resistance. Mark where it overlaps, lay it flat, measure the length in millimetres. That is your inside circumference; find it in the table above and take the number beside it.
Do it in the evening. Fingers are at their largest at the end of the day and in warm weather, and at their smallest first thing on a cold morning. Measuring at 8am in January is the single most common reason a ring turns out too tight.
If you fall between two sizes, take the larger one. A ring you cannot get off is a worse problem than one that turns a little.
Wide bands run small. If the band is 6 mm or wider, go up half a size.
Adjustable pieces need no size at all. Where a piece is adjustable the product page says so and does not ask you for a number.
Necklaces
| 40 cm / 16" | Sits at the base of the throat. Bare neckline. |
| 45 cm / 18" | Just below the collarbone. Our default, and the one that works with most things. |
| 50 cm / 20" | Top of the sternum. Sits well over a shirt or knitwear. |
| 55 cm / 22" | Mid chest. Good for a larger stone that wants space around it. |
| 60 cm / 24" | Below the bust. For layering, or over a coat. |
To check: hold a tape measure round your neck at the height you want the stone to sit, and read the number. If you are layering, leave at least 5 cm between chains or they tangle.
Bracelets
Measure round your wrist with a tape or a strip of paper, just below the wrist bone, snug against the skin. Then add:
- +1 cm for a close fit that stays where you put it
- +2 cm for a comfortable fit that moves a little — most people want this
- +3 cm for a loose fit that slides down the hand
| Wrist 14–15 cm | Small | Bracelet 16–17 cm |
| Wrist 15–16.5 cm | Medium | Bracelet 17–18.5 cm |
| Wrist 16.5–18 cm | Large | Bracelet 18.5–20 cm |
Beaded bracelets on elastic have almost no give once strung, so measure this one properly rather than guessing.
Earrings
Every product page lists the drop — the distance from the top of the ear wire to the bottom of the stone — and the weight in grams. Weight matters more than most people expect: anything over about 8 grams per earring will be felt by the end of an evening, and stone is heavier than it looks.
If it still isn't right
Rings can often be resized by half a size either way, depending on the setting — email us and we will tell you honestly whether yours can be. Chains can be shortened. Non-engraved pieces can be returned within 14 days under Returns & Refunds.
Not sure before you order? Email hello@asieight.com with your measurements and we will tell you which number to choose. We would much rather spend five minutes on that than remake a ring.