Ring size guide

Find your exact size in just a few minutes. Complete FR/US/UK conversion table, 3 simple measuring methods and expert advice from the Els Benvinguts jewellery boutique in Andorra.

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Choosing the right ring size is essential for comfortable, secure wear. Too tight, it cuts off the circulation; too loose, it risks slipping off and being lost. This complete guide walks you through, step by step, how to measure your ring size accurately, understand international correspondences (France, United States, United Kingdom) and avoid the most common mistakes.

At Els Benvinguts, a fine-jewellery boutique based in Andorra, we help every customer find their ideal size. Whether you are buying a ring for yourself or as a gift, this guide answers all your questions.

Ring size table: complete FR / US / UK conversion

The table below brings together the French ring sizes with their equivalent in diameter (mm), circumference (mm), American (US) size and British (UK) size. Highlighted rows = the most common sizes worn by women.

FR size	Diameter (mm)	Circumference (mm)	US	UK
44	14.0	44	3	F
46	14.6	46	3 ½	G
47	15.0	47	4	H
48	15.3	48	4 ½	H
49	15.6	49	4 ¾	I
50	15.9	50	5	J
51	16.2	51	5 ½	K
52	16.6	52	6	L
53	16.9	53	6 ¼	L
54	17.2	54	6 ¾	M
55	17.5	55	7	N
56	17.8	56	7 ¼	N
57	18.2	57	8	O
58	18.5	58	8 ¼	P
59	18.8	59	8 ¾	P
60	19.1	60	9	Q
61	19.4	61	9 ½	Q
62	19.7	62	10	R
63	20.1	63	10 ¼	S
64	20.4	64	10 ½	S
65	20.7	65	10 ¾	T
66	21.0	66	11	T
68	21.6	68	11 ½	V
70	22.3	70	12	W
72	22.9	72	12 ½	X

★ Highlighted rows = sizes 48-55, the most common for women in France.

💡 Quick formula: the French size = the inner circumference of the finger in mm. For the diameter: size ÷ 3.14. E.g. size 52 → diameter = 52 ÷ 3.14 = 16.6 mm.

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All available in your size, made in France and Spain: Els Benvinguts jewellery boutique, Andorra

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How to measure your ring size: 3 reliable methods

Here are 3 ways to measure your ring size at home, without any professional equipment.

Paper or string method

The simplest way to find your size without a ring sizer.

Cut a thin strip of paper (5 mm wide)
Wrap it around the finger, just below the knuckle
Mark the meeting point with a pencil
Lay it flat and measure the length in mm
That number = your French size

Measuring with an existing ring

The most accurate method if you already have one.

Place the ring on a white sheet
Measure the inner diameter in mm
Multiply by π (3.14159)
The result = your French ring size

Professional ring sizer at the jeweller's

The most precise method, available free of charge in jewellery boutiques.

Try the rings on your finger one by one
The ring should pass over the knuckle without forcing
It should stay in place without spinning freely
For wide rings: take one size up

⏰ When to measure? At the end of the day, when fingers are slightly more swollen. Avoid measuring first thing in the morning or after sport.

⚠ Elastic string: never use an elastic — the measurement will be wrong and your ring too large.

The 6 mistakes to avoid when choosing your ring size

🌡️

Measuring with swollen fingers

Heat, salt and physical activity make fingers swell by half a size. Measure at room temperature, in a calm setting.

❄️

Ignoring summer / winter variations

In winter, fingers shrink; in summer, they swell. Variation of 0 to 1 full size. Measure at 20 °C if possible.

💍

Forgetting the width of the ring

A wide ring (>6 mm) will feel tighter. For wide rings, take a size above your usual measurement.

✋️

Measuring the wrong hand

The dominant hand is often a size larger. Measure the finger on which you intend to wear the ring.

📐

Measuring in the morning on waking

Fingers are thinner first thing. A morning measurement may give a size that is too small. Measure in the late afternoon.

⚠

Confusing diameter and circumference

FR size = circumference in mm (NOT diameter). Size 54 = 54 mm finger circumference, but only 17.2 mm in diameter.

Expert
tip

At Els Benvinguts we recommend measuring the finger at least twice, at different times, and going with the larger reading. When in doubt between two sizes, choose the larger one: a jeweller can always resize a ring.

Women's vs men's ring sizes

Sizes vary noticeably depending on the profile. Here are the key reference points.

Women's ring size

Women's ring sizes generally fall between 48 and 56 — size 52 is the most common in France.

Slim fingers: 48 to 50
Standard hand: 51 to 54
Stronger hand: 55 to 58
Average women's size in France: 52 to 54

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Men's ring size

Men's ring sizes generally range from 58 to 68, with an average around 62 to 64.

Slim hand: 56 to 60
Standard hand: 60 to 64
Strong hand: 65 to 70+
Average men's size in France: 62 to 64

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Which finger for which ring?

Left ring finger: engagement ring, wedding band (French tradition)
Right ring finger: evening ring, fashion ring
Middle finger: statement ring, wide ring
Index finger: signet, solitaire
Little finger: men's signet, character ring

Each finger may have a different size: measure the specific finger concerned.

How to choose a ring size as a gift?

How can you find someone's ring size without asking them directly? Our expert tips:

Borrow an existing ring: measure its inner diameter × 3.14
Compare with your hand: adjust according to their build
Ask a friend: a trusted friend can find out discreetly
Observe their jewellery: if they wear a 50 on the little finger, their ring finger is probably 52 to 54

Recommended average sizes for a gift

Profile	Recommended size	Finger
Petite-build woman	50 to 52	Ring finger
Average-build woman	52 to 54	Ring finger
Larger-build woman	54 to 56	Ring finger
Slim-build man	58 to 60	Ring finger
Average-build man	62 to 64	Ring finger
Larger-build man	64 to 68	Ring finger

💡 When in doubt: always go for the size up. A jeweller can always enlarge or reduce a ring, but some rings set all the way around cannot be modified.

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FAQ — frequently asked questions about ring sizes

How can I measure my ring size at home?

The simplest method is the paper strip: cut a fine strip, wrap it around your finger, mark the join and measure in mm. That figure is your French size. You can also measure an existing ring (diameter × 3.14) or use a non-elastic string.

What is the average ring size for a woman?

The most common size for a woman in France is size 52. Most women fall between 50 and 56. For a gift without knowing the exact size, size 52 is statistically the best choice.

How can I convert a French ring size to a US size?

Use our conversion table. Key reference points: FR 50 = US 5, FR 52 = US 6, FR 54 = US 6 ¾, FR 56 = US 7 ¼, FR 60 = US 9. The conversion is not linear: see the full table above for all equivalences.

Why does my ring size change between summer and winter?

Heat dilates the blood vessels and makes fingers swell; cold makes them shrink. This variation can amount to between ½ and 1 full size. Measure at room temperature (20 °C) for a stable reference reading.

What if I'm between two sizes?

Always choose the larger size for comfortable wear. A slightly loose ring is preferable to one that is too tight. Your jeweller can adjust it if necessary.

How do I choose the size for a wide ring or a signet ring?

For a wide ring (>6 mm), take ½ size more. For a men's signet ring of 8-10 mm, take a full size up. The width increases friction on the finger and makes the ring feel tighter.

Can a ring be enlarged or reduced after purchase?

Yes, most plain gold or silver rings can be resized by 1 to 2 sizes by a jeweller. Rings set all the way around (full pavé, eternity) cannot generally be modified. At Els Benvinguts we tell you before purchase whether a ring can be resized.

Which ring size to choose for a gift?

For a woman without information: choose size 52 (the most frequent average size). For a man: size 62. When in doubt, always prefer the size up. Also check the seller's return and exchange conditions: Els Benvinguts accepts size exchanges within 15 days.

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Els Benvinguts is a jewellery boutique based in the Principality of Andorra. Thanks to a favourable tax regime, our jewellery is up to 30% cheaper than in France for equivalent quality. All our rings are authenticated, accompanied by a certificate, and dispatched with secure delivery throughout Europe.

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📞 Need help? Our team is available by phone +376 855 150 (Andorra) / +33 6 50 51 61 19 (France) and by email (contact@elsbenvinguts.com) to guide you in choosing your size.