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Hartenstein Jewellery

Sizing

Size Guide

A beautiful jewel should feel as considered as it looks. The right size is especially important: it helps us craft your jewellery with the correct proportion, comfort and fit from the beginning.

How to Measure Your Ring Size

You can measure your ring size with a thin strip of paper, a soft measuring tape or a piece of fabric string.

Method 1 — Measure Your Finger

  1. Cut a thin strip of paper or use a soft fabric string.
  2. Wrap it around the base of the finger where you will wear the ring.
  3. Make sure it feels close to the skin, but not tight.
  4. Mark the point where the paper or string meets.
  5. Lay it flat and measure the length in millimetres with a ruler.

The measurement in mm is your European ring size.

Method 2 — Measure a Ring You Own

  1. Choose a ring that fits the correct finger comfortably.
  2. Measure the inner diameter from one inside edge to the opposite inside edge.
  3. Use the table below to find the closest European size.

Best with plain, round rings. Wide bands may need a slightly different fit.

Ring Size Conversion Table

CircumferenceDiameterEU / DE / FRIT / ES / CH
44 mm14.0 mm444
45 mm14.3 mm455
46 mm14.6 mm466
47 mm15.0 mm477
48 mm15.3 mm488
49 mm15.6 mm499
50 mm15.9 mm5010
51 mm16.2 mm5111
52 mm16.6 mm5212
53 mm16.9 mm5313
54 mm17.2 mm5414
55 mm17.5 mm5515
56 mm17.8 mm5616
57 mm18.1 mm5717
58 mm18.5 mm5818
59 mm18.8 mm5919
60 mm19.1 mm6020
61 mm19.4 mm6121
62 mm19.7 mm6222
63 mm20.1 mm6323
64 mm20.4 mm6424
65 mm20.7 mm6525
66 mm21.0 mm6626
67 mm21.3 mm6727
68 mm21.6 mm6828
69 mm22.0 mm6929
70 mm22.3 mm7030

Measuring Tips

  • Measure at the end of the day, when hands are at their natural size.
  • Avoid measuring when hands are very cold, very warm or swollen.
  • For wider rings and larger eternity bands (especially around 3 CTW), choose a slightly more generous fit.
  • For additional peace of mind, please check our resizing offer before placing your order.

How to Measure Your Bracelet Size

Use a soft measuring tape, a strip of paper or a piece of fabric string.

  1. Wrap it around your wrist where you would normally wear the bracelet.
  2. Keep it close to the skin, but not tight.
  3. Mark the point where the paper or string meets.
  4. Lay it flat and measure the length in millimetres with a ruler.

This is your wrist measurement. Add extra length depending on how you prefer to wear your bracelet.

Bracelet Size Guide

WristClose FitComfortable FitRelaxed Fit
140 mm155 mm160 mm170 mm
145 mm160 mm165 mm175 mm
150 mm165 mm170 mm180 mm
155 mm170 mm175 mm185 mm
160 mm175 mm180 mm190 mm
165 mm180 mm185 mm195 mm
170 mm185 mm190 mm200 mm
175 mm190 mm195 mm205 mm
180 mm195 mm200 mm210 mm
185 mm200 mm205 mm215 mm
190 mm205 mm210 mm220 mm
195 mm210 mm215 mm225 mm
200 mm215 mm220 mm230 mm

Close Fit

Sits nearer to the wrist and moves less.

Comfortable Fit

Allows natural movement and is usually the best choice for daily wear.

Relaxed Fit

Sits looser and gives more movement around the wrist.

For cuffs, bangles and personalised bracelets, the shape of the piece matters as much as the measurement. If your piece is made to order, we may ask for additional wrist details before production begins.