Printable Ring Sizer & Ring Size Chart (US, UK, EU, HK)
Measure your ring size at home in five minutes with a free printable sizer, then read your size in US, UK, EU and Hong Kong (HK) systems.
Download the printable ring sizer (PDF, US Letter)
Before you print: check the scale
Set your print dialog to 100% or "Actual size". Do not use "Fit to page". Measure the 50 mm ruler at the top of page 1 with a real ruler or a credit card (85.6 mm wide). If it is off, the sizer will be off too.
How to measure
- With a ring that already fits (most reliable): place it on the circles on page 1. Your size is the circle whose line sits just inside the ring's inner edge.
- With the paper strip: cut out the full-scale strip on page 2, wrap it snugly around the base of the finger, mark where it meets, and read the circumference in mm. Make sure it still slides over the knuckle.
- Measure three times, at the end of the day, when your hands are warm. Between two sizes, choose the larger.
Ring size chart: US, UK, EU and HK
Inner diameter and inner circumference in millimetres. UK sizes are rounded to the nearest half letter; EU sizes equal the circumference in mm.
| US | UK | EU | HK | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|
| 2.75 | E½ | 43 | 5 | 13.8 | 43.3 |
| 3 | F | 44 | 6 | 14.1 | 44.3 |
| 3.5 | G | 46 | 7 | 14.5 | 45.5 |
| 3.75 | H | 46 | 8 | 14.8 | 46.5 |
| 4.25 | I | 48 | 9 | 15.2 | 47.7 |
| 4.75 | I½ | 49 | 10 | 15.5 | 48.7 |
| 5.25 | J½ | 50 | 11 | 15.9 | 49.9 |
| 5.5 | K½ | 51 | 12 | 16.2 | 50.9 |
| 6 | L½ | 52 | 13 | 16.6 | 52.1 |
| 6.5 | M | 53 | 14 | 16.9 | 53.1 |
| 7 | N | 54 | 15 | 17.3 | 54.3 |
| 7.5 | O | 56 | 16 | 17.7 | 55.6 |
| 7.75 | P | 56 | 17 | 18.0 | 56.5 |
| 8.25 | Q | 58 | 18 | 18.3 | 57.5 |
| 8.75 | Q½ | 59 | 19 | 18.7 | 58.7 |
| 9 | R½ | 60 | 20 | 19.0 | 59.7 |
| 9.5 | S½ | 61 | 21 | 19.4 | 60.9 |
| 10 | T½ | 62 | 22 | 19.7 | 61.9 |
| 10.25 | U | 63 | 23 | 20.1 | 63.1 |
| 10.75 | V | 64 | 24 | 20.4 | 64.1 |
| 11.25 | W | 65 | 25 | 20.8 | 65.3 |
| 11.5 | X | 66 | 26 | 21.1 | 66.3 |
| 12 | Y | 68 | 27 | 21.5 | 67.5 |
| 12.5 | Y½ | 68 | 28 | 21.8 | 68.5 |
| 12.75 | Z+ | 70 | 29 | 22.2 | 69.7 |
| 13.25 | Z+ | 71 | 30 | 22.5 | 70.7 |
Our resize rule for custom rings
Custom rings are made to your approved size. If the fit is not right, one size change is free (you cover shipping). A change of up to 2 HK sizes is possible but requires a new band, charged separately; your centre diamond is reused. Read the full custom order terms or our ring size guide.
Ready to design? Build your ring and enter your size in US or HK.
FAQ
Will the printable ring sizer be accurate?
Yes, if it prints at true scale. Print at 100% or 'Actual size', then measure the 50 mm ruler at the top of the page with a real ruler. If it is not exactly 50 mm, adjust your printer settings and print again.
Which size should I pick if I am between two sizes?
Choose the larger size. A slightly loose ring can be adjusted; a ring that will not pass the knuckle cannot be worn.
Why does STELLIVON show Hong Kong (HK) sizes?
Our workshop sizes every ring in HK sizes, so we show your US size alongside its HK equivalent to avoid conversion errors.
Can I change the size after my custom ring is made?
One size change is free; you cover shipping. A change of up to 2 HK sizes is possible but needs a new band, charged separately, and your centre diamond is reused.
Can I measure with string?
String stretches and twists, so it often reads wrong. Use the paper strip on page 2 of the PDF, or the circles with a ring that already fits.