The World of Jewellery

Practical guides to choosing jewellery, materials and care — so you know what you are buying and how to wear it.

Start here

How to chooseChains: how to choose a weave and claspWhich chain weave stands up to everyday wear, how anchor, curb and Bismarck weaves differ, and which clasp really holds.
How to choosePendants: what to choose and how to pair them with a chainWhy a pendant doesn't always fit on a chain, which size suits which length, and why the chain tends to break right under the pendant.
How to chooseNecklaces: how to choose for your neckline and how to layerHow a necklace differs from a chain, which styles suit which neckline, and how big a length gap you need so two necklaces don't tangle.
How to chooseBracelets: clasps, sizing and why they wear out firstWhich clasp you can fasten with one hand, how snugly a bracelet should fit, and why it wears out faster than the rest of your jewellery.
How to chooseGold-plated earrings: how to choose and care for themHow to choose gold-plated earrings: the difference between 14K and 18K plating, which fastening to pick, everyday care and expert tips, all in one place.
How to chooseEarrings – how to choose the fastening, shape and weightHow push-backs, leverbacks, French hooks and clip-ons differ, how much weight is too much for your ears and what to choose if they're sensitive.
How to chooseEngagement rings: how to choose one and find out her sizeElegant engagement rings in medical steel with gold plating and cubic zirconia. Find out how to pick the right ring — and explore the ROTAS69 collection.
How to chooseWomen's necklaces – how to choose the right oneHow to choose a necklace: lengths, necklines and layering. Gold-plated and medical steel necklaces for everyday wear and special occasions.
How to chooseFour-leaf clover earrings — what they mean and how to chooseWhat the four-leaf clover means in jewellery, how to choose the size and fastening, and how to care for gold-plated clover earrings.
How to chooseHow to choose a ring: size, width and settingWhy the same ring size fits one day and pinches the next, why a wide band needs a larger size, and which setting won't catch on your clothes.
How to chooseMen's jewellery — chain, bracelet and ringWhich chain and bracelet suit a man, how to choose the width for your wrist, and why one metal tone is the only rule that really works.

Size guide

How to measure your finger

A

Measure a ring you already have

Take a ring that fits the finger you want to wear it on. Use a ruler to measure straight across the inside — 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.

Size chart

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

Full size chart — exact 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.