How to measure your ring size at home

Buying a ring without knowing the size is the single most common reason for a return. Three methods will give you the answer at home, in a few minutes, with nothing more than paper and a ruler.

The paper strip method

Cut a strip of paper about a centimetre wide, or take a tailor's tape. Wrap it around the base of the finger without pulling: it should stay in place without marking the skin, yet not slide off on its own. Mark where the strip overlaps, then measure the length in millimetres.

That number is your size. A circumference of 52 mm is a size 52 in the French sizing we use. It really is that simple.

The reference ring method

If you already own a ring worn on the same finger, lay it on a ruler and measure its inner diameter, edge to edge through the centre. Multiply that diameter by 3.14 to get the circumference.

A 16.5 mm diameter gives 51.8 mm, so a size 52. This is the most reliable of the three methods — provided the reference ring genuinely fits.

The printable ring sizer

A ring sizer is a paper strip you cut out and slide around the finger. Print it at 100 % scale, with any automatic fit-to-page option switched off: a few percent of shrinkage is enough to throw the result off by a full size. Check the printed control mark against a ruler before you cut.

Three precautions that change everything

• Measure late in the day. Fingers swell slightly as the hours pass; a measurement taken first thing often reads half a size small.
• Avoid cold days. Fingers contract in the cold. Wait until you have been somewhere warm for a while.
• Wide band, go up a size. A band wider than 6 mm covers more of the finger and feels tighter. Take half a size, sometimes a full size, above your measurement.

Once you know your size, all that is left is choosing. Our rings run from size 50 to size 70 depending on the model.