Ring Size Guide
Every Kavseyn ring is made to order in solid 14K or 18K gold — so it's worth taking a minute to get your size right. We offer full and half sizes from US 4 to 12. Pick the method that suits you.
Measure a ring you already own
The most accurate method. If you have a ring that fits the finger you're buying for, start here.
- Pick the right ring. Choose one that sits comfortably on the finger you plan to wear your Kavseyn piece on — fit differs from finger to finger, and between hands.
- Lay it flat. Place the ring on a flat surface, on top of a ruler marked in millimetres.
- Measure the inner diameter. Measure straight across the inside of the band — from the inner edge on one side to the inner edge on the other, through the centre. Don't include the metal itself.
- Read it in millimetres and match it to the diameter column in the chart below. Half sizes matter: 16.5 mm is a US 6, while 16.9 mm is a US 6.5.
Tip: measure the same ring two or three times and take the average — half a millimetre is a half size.
Measure your finger
No ring to go by? All you need is a strip of paper, a pen and a ruler.
Step 1
Cut a paper strip
Cut a strip of paper roughly 10 cm long and no more than 1 cm wide. Keep it narrow — a wide strip bunches up around the finger and gives you a reading that's too large.
Step 2
Wrap it around your finger
Wrap the strip around the base of the finger you'll wear the ring on. It should sit snug — close to the skin, but loose enough to slide over your knuckle. If your knuckle is wider than the base, measure the knuckle instead.
Step 3
Mark where it overlaps
Holding the strip in place, mark the exact point where the end meets the rest of the strip. A fine pen or pencil line is best — a thick mark can cost you half a size.
Step 4
Measure it with a ruler
Unwrap the strip, lay it flat and measure from the end to your mark in millimetres. That length is your finger's circumference — match it to the chart below, half sizes included.
Tip: measure at the end of the day, when your hands are warm — fingers are at their largest then. If you land between two sizes, take the half size above.
US ring size chart
Every size below — full and half — is available on all Kavseyn rings.
| US size | Inner diameter | Circumference |
|---|---|---|
| 4 | 14.9 mm | 46.8 mm |
| 4.5 | 15.3 mm | 48.0 mm |
| 5 | 15.7 mm | 49.3 mm |
| 5.5 | 16.1 mm | 50.6 mm |
| 6 | 16.5 mm | 51.9 mm |
| 6.5 | 16.9 mm | 53.1 mm |
| 7 | 17.3 mm | 54.4 mm |
| 7.5 | 17.7 mm | 55.7 mm |
| 8 | 18.1 mm | 57.0 mm |
| 8.5 | 18.5 mm | 58.3 mm |
| 9 | 18.9 mm | 59.5 mm |
| 9.5 | 19.4 mm | 60.8 mm |
| 10 | 19.8 mm | 62.1 mm |
| 10.5 | 20.2 mm | 63.4 mm |
| 11 | 20.6 mm | 64.6 mm |
| 11.5 | 21.1 mm | 65.9 mm |
| 12 | 21.4 mm | 67.2 mm |
Good to know
- Mind the knuckle. The ring has to clear it — if your knuckle is wider than the base of your finger, size to the knuckle.
- Wide bands run snug. For bands 6 mm and wider, go up half a size.
- Temperature matters. Fingers shrink in the cold and swell in the heat — measure when your hands are at room temperature or warmer.
- Between sizes? That's what half sizes are for — and if you're still on the fence, take the larger one.
Still unsure? Email us before you order — every piece is made to order, so we'd rather get it right the first time.