Brand chart · United States
Tiffany ring size chart
Tiffany & Co. prints the standard US numeric scale, so a Tiffany 6 is a US 6 — 16.5 mm across the inside. The table below gives every size the house sells in millimetres, along with the UK letter and the EU number for anyone converting from another market.
The table
Tiffany & Co. sizes in millimetres
Tiffany & Co. quotes the us / canada numeric scale. A number from about 2 to 15 in half and quarter steps. Each whole size adds 2.5535 mm of inside circumference, so the scale is a straight line.
| Tiffany & Co. size | Ø mm | Circ. mm | UK / AU | EU / ISO | India | Japan |
|---|---|---|---|---|---|---|
| 3 | 14.1 | 44.2 | F | 44 | 4 | #4 |
| 3½ | 14.5 | 45.5 | G | 45 | 5 | #5 |
| 4 | 14.9 | 46.8 | H | 47 | 7 | #6 |
| 4½ | 15.3 | 48.0 | I | 48 | 8 | #8 |
| 5 | 15.7 | 49.3 | J | 49 | 9 | #9 |
| 5½ | 16.1 | 50.6 | K | 51 | 11 | #10 |
| 6 | 16.5 | 51.9 | L | 52 | 12 | #11 |
| 6½ | 16.9 | 53.1 | M | 53 | 13 | #13 |
| 7 | 17.3 | 54.4 | N | 54 | 14 | #14 |
| 7½ | 17.7 | 55.7 | O | 56 | 15 | #15 |
| 8 | 18.1 | 57.0 | P | 57 | 17 | #16 |
| 8½ | 18.5 | 58.2 | Q | 58 | 18 | #17 |
| 9 | 18.9 | 59.5 | R | 60 | 19 | #18 |
| 9½ | 19.4 | 60.8 | S | 61 | 21 | #19 |
| 10 | 19.8 | 62.1 | T | 62 | 22 | #21 |
| 10½ | 20.2 | 63.3 | U | 63 | 23 | #22 |
| 11 | 20.6 | 64.6 | V | 65 | 25 | #23 |
| 11½ | 21.0 | 65.9 | W | 66 | 26 | #24 |
| 12 | 21.4 | 67.2 | X | 67 | 27 | #25 |
| 12½ | 21.8 | 68.5 | Y | 68 | 28 | #27 |
| 13 | 22.2 | 69.7 | Z | 70 | 30 | #28 |
| 13½ | 22.6 | 71.0 | Z+1 | 71 | 31 | #29 |
Derived from ISO 8653, the standard the whole trade sizes against, and labelled with the scale Tiffany & Co. prints. It is a conversion table, not a copy of the brand's own list — confirm the exact range against the retailer before ordering, since any house can change what it stocks.
How Tiffany sizes are quoted
Tiffany quotes US sizes, generally in half steps, and a handful of styles are cut in quarter sizes. Nothing about the numbering is proprietary: the number on the tag is the same number a US jeweller would use, which means a measurement taken here converts to it directly.
Outside the United States the boutiques still work in the US scale, so a London or Tokyo purchase is quoted as a number rather than a letter or a #. If you have been sized in UK letters, read across the table — a UK N is a US 6¾ to 7.
Before you order
The engagement rings and the wide band styles behave differently on the finger. A solitaire in a 2 mm band sizes exactly as measured; a wide or eternity band wants half a size more, because a wider band presses against more of the finger. Our band width guide sets out the allowance.
Resizing is the part worth checking first, not last. Plain and solitaire styles can usually be resized; channel-set, pavé and full eternity bands often cannot be, because the stones run the whole way round. Ask the boutique what the specific style allows before you commit to a size.
Before you order
What moves the size on a Tiffany & Co. ring
- Eternity bands do not resize
- A band with stones all the way round has no plain section to cut and rejoin. Get the size right the first time, and go up rather than down if you are between two.
- Half sizes are the real granularity
- Quarter sizes exist on paper and a bench jeweller can cut them, but most stock is half sizes. A measurement landing on a quarter should round up.
- Measure late in the day
- Fingers are smallest cold and first thing in the morning. Size in the late afternoon at room temperature so the ring fits all day, not just part of it.
Ordering from elsewhere
Your size in the market you are buying from
The us / canada numeric scale is read in United States, Canada, Singapore, Malaysia, United Arab Emirates. Pick where you are ordering from and the switcher gives the local number for the same finger — or the millimetre, where local practice is too mixed to convert into.
Do not know it? Measure a ring on your calibrated screen — it is the only number here that is not a conversion of another number.
Indian numeric
14
A number from 1 to about 30. Indian jewellers frequently print the UK letter beside it, because both are in daily use.
India. Indian jewellers quote a numeric scale of their own, roughly 1 to 30. Tanishq, Malabar Gold, Kalyan and GIVA all use it, and many print the UK letter beside it. Online-first brands often list US sizes as well, so check which scale a listing means before ordering. Full India ring size chart.
United States. The US numeric scale, sold mostly in half sizes. Quarter sizes exist and a jeweller can cut them, but they are rarely stocked. Full USA ring size chart.
United Kingdom. Letters, in half-letter steps. British hallmarked rings are usually stamped with the letter, so an inherited ring often tells you its own size if you look inside the band. Full UK ring size chart.
Europe. France, Germany, the Netherlands and Scandinavia quote the ISO 8653 number, which is the inside circumference in millimetres. Italy, Spain and Switzerland quote the same measurement minus 40, so a 54 becomes a 14. Full Europe ring size chart.
Japan. The Japanese numeric scale runs #1 to about #27 for the sizes people actually order. Mikimoto, Tasaki and 4°C all use it. Japanese sizes are usually whole numbers only. Full Japan ring size chart.
China. Mainland Chinese listings usually give 圈号 — the inside circumference in millimetres, the same number as EU/ISO. Hong Kong uses a separate numbered scale, and marketplace listings mix both with US sizes. Order by inside diameter in millimetres when a listing does not say which scale it means.
Australia. Australia and New Zealand use the UK letter scale unchanged, so a UK N is an Australian N.
Canada. Identical to the United States. A US 7 is a Canadian 7, with no conversion in between.
Singapore. Singapore retail is mixed: international brands quote US numbers, goldsmiths in the Chinese tradition quote Hong Kong numbers, and British-founded chains quote letters. Ask for the inside diameter in millimetres and you sidestep the whole problem.
Malaysia. As in Singapore, US numbers dominate modern retail while traditional goldsmiths use Hong Kong numbers. Confirm the scale, or the diameter, before you order.
United Arab Emirates. Gulf retail quotes US sizes most often. British-founded chains use letters, and the many Indian gold houses in Dubai use the Indian scale, so the same finger can be quoted three ways along one street.
South Africa. South Africa follows the UK letter scale. Online stores that ship from the United States will quote numbers instead.
Brazil. Brazilian sizes are the inside circumference in millimetres minus 40 — the same arithmetic Switzerland uses. A 54 mm circumference is a Brazilian 14.
Mexico. Mexican jewellers use a local numeric scale that is not the US one, and the published conversions for it disagree with each other. We will not print a number we cannot stand behind, so order by inside diameter in millimetres, or ask the retailer for the diameter of the size they are offering. Large chains and online stores generally quote US sizes.
Questions
Tiffany & Co. sizing, answered
Does Tiffany use US ring sizes?
Yes. Tiffany & Co. quotes the standard US numeric scale worldwide, so a Tiffany size 6 is a US 6, or 16.5 mm inside diameter.
What is the most common Tiffany engagement ring size?
US 6 to 6.5 is the usual centre of the range for women, matching the average ring size for women generally. It is a reasonable guess for a surprise proposal and no substitute for a real measurement.
Can a Tiffany ring be resized?
Plain bands and most solitaire settings can be. Full eternity, channel-set and pavé bands frequently cannot, because there is no plain stretch of metal to work with. Confirm for the specific style before ordering.
How do I convert a UK size to a Tiffany size?
Read across the table above, or use the international ring size chart. A UK L is about a US 5¾, a UK N about a US 6¾, and a UK R about a US 8¾.
Measure once, order in any scale
The sizer calibrates your screen against a bank card first, so the circle you match your ring to is a real millimetre wide.