Tiffany & Co. ring size guide
Tiffany & Co. uses US sizing for its US market, in half-size steps. If you know your US size, your Tiffany size is the same — and the chart below gives the UK and EU equivalents.
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Your size is US 7 (UK N½, EU 54).
Fit confidence Exact table match
Fit confidence 70/100 · Medium Standard chart conversion; final fit still depends on band width and knuckle shape. Confirm with a printable or physical sizer before ordering an expensive ring.
- US
- 7
- UK
- N½
- EU / ISO
- 54
- Japan
- 14
- CH / IT / ES
- 14
- Inner diameter, millimetres
- 17.32
- Circ mm
- 54.4
Why this size?
Your input maps to US 7 — UK N½, EU 54, JP 14, Ø 17.32 mm.
Inner diameter is exact to about ±0.1 mm. String or on-screen methods add roughly ½–1 size of noise, so confirm with a second method before buying an expensive or non-resizable ring.
More options
Choose the fit problem and get the safest next step before resizing, replacing or buying another ring.
Too tight or stuck Too loose or spinning Wide band or comfort-fit Non-resizable or brand ring
| US | UK | EU | JP | CH | Inner diameter, millimetres | Circ mm |
|---|---|---|---|---|---|---|
| 3 | F½ | 44 | 4 | 4 | 14.07 | 44.2 |
| 3.5 | G½ | 45 | 5 | 5 | 14.48 | 45.5 |
| 4 | H½ | 47 | 7 | 7 | 14.88 | 46.8 |
| 4.5 | I½ | 48 | 8 | 8 | 15.29 | 48.0 |
| 5 | J½ | 49 | 9 | 9 | 15.70 | 49.3 |
| 5.5 | K½ | 51 | 10 | 11 | 16.10 | 50.6 |
| 6 | L½ | 52 | 12 | 12 | 16.51 | 51.9 |
| 6.5 | M½ | 53 | 13 | 13 | 16.92 | 53.1 |
| 7 | N½ | 54 | 14 | 14 | 17.32 | 54.4 |
| 7.5 | O½ | 56 | 15 | 16 | 17.73 | 55.7 |
| 8 | P½ | 57 | 16 | 17 | 18.14 | 57.0 |
| 8.5 | Q½ | 58 | 17 | 18 | 18.54 | 58.3 |
| 9 | R½ | 60 | 18 | 20 | 18.95 | 59.5 |
| 9.5 | S½ | 61 | 19 | 21 | 19.35 | 60.8 |
| 10 | T½ | 62 | 20 | 22 | 19.76 | 62.1 |
| 10.5 | U½ | 63 | 22 | 23 | 20.17 | 63.4 |
| 11 | V½ | 65 | 23 | 25 | 20.57 | 64.6 |
| 11.5 | W½ | 66 | 24 | 26 | 20.98 | 65.9 |
| 12 | Y | 67 | 25 | 27 | 21.39 | 67.2 |
| 12.5 | Z | 68 | 26 | 28 | 21.79 | 68.5 |
| 13 | Z½ | 70 | 27 | 30 | 22.20 | 69.7 |
How Tiffany & Co. sizing works
Tiffany sizes are standard US numbers. Use your measured US size directly; for international Tiffany boutiques, convert to EU (circumference in mm) with the tool above.
Fast conversion anchors
These common reference points come from the same table used by the converter.
| Brand size | US | UK | EU |
|---|---|---|---|
| 6 | 6 | L½ | 52 |
| 7 | 7 | N½ | 54 |
| 9 | 9 | R½ | 60 |
Wide-band size calculator
Estimate the order size for a wider band, then confirm before buying a non-resizable ring.
Tiffany & Co. ring size chart
| Tiffany & Co. (US) | UK | EU | Inner diameter, millimetres |
|---|---|---|---|
| 3 | F½ | 44 | 14.07 |
| 3.5 | G½ | 45 | 14.48 |
| 4 | H½ | 47 | 14.88 |
| 4.5 | I½ | 48 | 15.29 |
| 5 | J½ | 49 | 15.70 |
| 5.5 | K½ | 51 | 16.10 |
| 6 | L½ | 52 | 16.51 |
| 6.5 | M½ | 53 | 16.92 |
| 7 | N½ | 54 | 17.32 |
| 7.5 | O½ | 56 | 17.73 |
| 8 | P½ | 57 | 18.14 |
| 8.5 | Q½ | 58 | 18.54 |
| 9 | R½ | 60 | 18.95 |
| 9.5 | S½ | 61 | 19.35 |
| 10 | T½ | 62 | 19.76 |
| 10.5 | U½ | 63 | 20.17 |
| 11 | V½ | 65 | 20.57 |
| 11.5 | W½ | 66 | 20.98 |
| 12 | Y | 67 | 21.39 |
| 12.5 | Z | 68 | 21.79 |
| 13 | Z½ | 70 | 22.20 |
Frequently asked questions
Does Tiffany use US ring sizes?
Yes, in the US market Tiffany uses standard US numeric sizing in half-size steps. A Tiffany 6 is a US 6 (UK L½, EU 52).
What is a Tiffany size 6 in UK and EU?
A US/Tiffany 6 is UK L½ and EU 52 (16.5 mm diameter, 51.9 mm circumference).
Ringsizely is an independent ring size converter and is not affiliated with, endorsed by, or sponsored by Tiffany & Co.. Brand names are used for identification only. Always confirm with the retailer before ordering a non-resizable ring.