Ring size guide

Measuring your size at home

The most reliable method is to measure the inside circumference of the finger, in millimetres. Wrap a strip of non-stretch paper around the finger, mark where it meets, then measure the length with a ruler. That length in millimetres corresponds directly to the Swiss and French size.

If you already own a ring worn on the right finger, measure its inside diameter and use the table below.

Three precautions

Measure at the end of the day, at room temperature: fingers swell slightly as the hours pass and contract in the cold.
The ring should pass the knuckle with slight resistance. If it slides without effort, it is too large.
A wide band (over 4 mm) is generally worn half a size larger than a slim one.

Conversion table

Inside diameter	Circumference	Switzerland / France	United Kingdom	United States
14.9 mm	46.8 mm	47	H½	4
15.3 mm	48.0 mm	48	I½	4½
15.7 mm	49.3 mm	49	J½	5
16.1 mm	50.6 mm	51	K½	5½
16.5 mm	51.9 mm	52	L½	6
16.9 mm	53.1 mm	53	M½	6½
17.3 mm	54.4 mm	54	N½	7
17.7 mm	55.7 mm	56	O½	7½
18.1 mm	57.0 mm	57	P½	8
18.5 mm	58.3 mm	58	Q½	8½
19.0 mm	59.5 mm	60	R½	9
19.4 mm	60.8 mm	61	S½	9½
19.8 mm	62.1 mm	62	T½	10

Values are rounded to the nearest tenth of a millimetre; if you hesitate between two rows, take the larger.

You do not have to decide now

Because our rings are made to order, the size is confirmed with you after purchase, at no extra cost. Order the piece, and we then agree the final size together before it goes into production. The ten to fifteen working days run from that confirmation.

If the ring delivered does not fit, an exchange of size is possible within thirty days, return carriage at our expense.