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.
Gift ideasValentine's Day jewelry: gift ideas for her and for himFrom heart pendants and pearl earrings to understated chains for men: how to choose a Valentine's jewelry present, get the size right and decide how much to spend.
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.
Gift ideasChristmas jewelry gifts for her and him, sorted by budgetChristmas jewelry for her and him in four price bands, with the checks to make before you buy and when to order so it arrives in time.
Gift ideasMother's Day 2027: dates across Europe and jewelry gift ideas for momMother's Day 2027 dates for the UK, Ireland and the rest of Europe, with jewelry gift ideas by personality, budget and skin type, plus tips on ordering in good time.
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.
Materials and qualityCeramic rings – pros, cons and how to chooseCeramic rings: how durable they are, whether they scratch and how to choose the right size. Black and white ceramic rings from ROTAS69.
Style and inspirationHow to build a jewelry collection from scratchWhich pieces to start with, in what order to add more, and how just five pieces can give you a jewelry wardrobe that works with everything.
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.

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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.