Sizes and fit

Size guide

Find your perfect size. All measurements are precise — and if you are unsure between two sizes, contact us, we will be happy to help.

01 — Rings

Ring size

Three precise ways to find your size. Start with whatever is at hand — a ring that already fits, a ruler or the screen.

Ring size calculator

Enter any one value — a size in any system or a measurement — and read off the others.

Tip: the most reliable is the inner diameter — measure it on a ring that already fits well.

A

Measure a ring you already have

Take a ring that fits the right finger. Measure its inside in a straight line with a ruler — that is the inner diameter in millimetres, and it is also the ROTAS69 size. Enter it in the calculator.

B

Measure your finger

Wrap a narrow strip of paper around the base of your finger (not over the knuckle). Mark where it overlaps, straighten it and measure the length in millimetres — that is the circumference.

C

Measure on screen

No ruler? Open the tool below and adjust a true-size circle to your ring.

Measuring on screen

Adjust to your ring. Place your ring on the screen and move the slider until the circle fits exactly inside the ring.

ROTAS69 Inner Ø 17.0 mm EU 53 US 6.5 UK M

Measuring on screen is a good guide. For the final size, measure with a ruler or contact us.

Full size table — precise values. The ROTAS69 size is the inner diameter of the ring (Inner Ø) in millimetres. The EU size corresponds to the circumference; UK letters may differ by ±½ between jewellers.

ROTAS69 Inner Ø US EU UK Circumference
14.5 mm 3.5 46 G 45.6 mm
14.9 mm 4 47 H 46.8 mm
15.3 mm 4.5 48 I 48.1 mm
15.7 mm 5 49 J 49.3 mm
16.1 mm 5.5 51 K 50.6 mm
16.5 mm 6 52 L 51.8 mm
16.9 mm 6.5 53 M 53.1 mm
17.3 mm 7 54 N 54.4 mm
17.7 mm 7.5 56 O 55.6 mm
18.1 mm 8 57 P 56.9 mm
18.5 mm 8.5 58 Q 58.1 mm
18.9 mm 9 59 R 59.4 mm
19.4 mm 9.5 61 S 60.9 mm
19.8 mm 10 62 T 62.2 mm
20.2 mm 10.5 63 U 63.5 mm
20.6 mm 11 65 V 64.7 mm
21.0 mm 11.5 66 W 66.0 mm
21.4 mm 12 67 X 67.2 mm
21.8 mm 12.5 68 Y 68.5 mm
22.2 mm 13 70 Z 69.7 mm
22.6 mm 13.5 71 Z+1 71.0 mm
23.0 mm 14 72 Z+2 72.3 mm
23.4 mm 14.5 74 Z+3 73.5 mm
23.8 mm 15 75 Z+4 74.8 mm
02 — Necklaces and chains

Necklace length

Where a chain will sit depends on its length and your build. Move the cursor over a length to see where it falls.

  • 40 cmChokerSits high, right at the base of the neck.
  • 45 cmClassicSits on the collarbone — the most popular length.
  • 50 cmA little lowerFalls a little lower, over the neckline.
  • 55 cmMatineeRests gently on the décolleté.
  • 60 cmLongRests on the chest — looks beautiful layered or over knitwear.

How to measure: lay your favourite necklace straight and measure it from end to end, or wrap a cord where you want the chain to sit and measure it. The length of each piece is given on the product page.

03 — Bracelets

Bracelet size

Measure your wrist just below the wrist bone — and we will add room for comfortable wear.

  • 16 cmwrist ≈ 14–14.5 cm
  • 17 cmwrist ≈ 15–15.5 cm
  • 18 cmwrist ≈ 16–16.5 cm
  • 19 cmwrist ≈ 17–17.5 cm
  • 20 cmwrist ≈ 18–18.5 cm
  • 21 cmwrist ≈ 19–19.5 cm

The length of each bracelet is given on the product page. If you are choosing a gift and do not know the wrist size, the safest choice is 17–18 cm.

Still not sure?

Send us your measurement and we will confirm the size before you order.

Ask us