The World of Jewelry

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

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How to chooseSwarovski and Austrian crystal vs cubic zirconia: how to tell them apartWhat Swarovski and Austrian crystal are, how they differ from cubic zirconia, how to recognize and care for them, and which to choose for day or evening.
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: how to choose the clasp and sizeWhich clasp you can fasten with one hand, how snugly a bracelet should fit, and why it wears out faster than the rest of your jewelry.
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, how to care for them and what to know if your skin is sensitive.
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 jewelry, 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 jewelry — chain, bracelet and ringWhich chain and bracelet suit a man, how to choose the chain width, 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 millimeters, 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 millimeters — 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 millimeters. The EU size corresponds to the circumference; UK letters may differ by ±½ between jewelers.