Ring Size Chart
Complete reference table showing ring sizes across all major international systems. Sort by any column, search for specific sizes, or filter by range.
US / CanadaUS | UK / AustraliaUK | EuropeEU | JapanJP | SwitzerlandCH | Diameter (mm)Dia. | Circumference (mm)Circ. |
|---|---|---|---|---|---|---|
| 3 | F | 44 | 4 | 4 | 14 mm | 44 mm |
| 3.25 | F½ | 44.6 | 5 | 4.5 | 14.2 mm | 44.6 mm |
| 3.5 | G | 45.2 | 5 | 5.25 | 14.4 mm | 45.2 mm |
| 3.75 | G½ | 45.8 | 6 | 5.75 | 14.6 mm | 45.8 mm |
| 4 | H | 46.5 | 7 | 6.5 | 14.8 mm | 46.5 mm |
| 4.25 | H½ | 47.1 | 7 | 7 | 15 mm | 47.1 mm |
| 4.5 | I | 47.7 | 8 | 7.75 | 15.2 mm | 47.7 mm |
| 4.75 | I½ | 48.3 | 8 | 8.25 | 15.4 mm | 48.3 mm |
| 5 | J | 49 | 9 | 9 | 15.6 mm | 49 mm |
| 5.25 | J½ | 49.6 | 10 | 9.5 | 15.8 mm | 49.6 mm |
| 5.5 | K | 50.2 | 10 | 10.25 | 16 mm | 50.2 mm |
| 5.75 | K½ | 50.8 | 11 | 10.75 | 16.2 mm | 50.8 mm |
| 6 | L | 51.5 | 12 | 11.5 | 16.5 mm | 51.5 mm |
| 6.25 | L½ | 52.1 | 12 | 12 | 16.7 mm | 52.1 mm |
| 6.5 | M | 52.7 | 13 | 12.75 | 16.9 mm | 52.7 mm |
| 6.75 | M½ | 53.3 | 13 | 13.25 | 17.1 mm | 53.3 mm |
| 7 | N | 54 | 14 | 14 | 17.3 mm | 54 mm |
| 7.25 | N½ | 54.6 | 14 | 14.5 | 17.5 mm | 54.6 mm |
| 7.5 | O | 55.2 | 15 | 15.25 | 17.7 mm | 55.2 mm |
| 7.75 | O½ | 55.8 | 15 | 15.75 | 17.9 mm | 55.8 mm |
| 8 | P | 56.5 | 16 | 16.5 | 18.1 mm | 56.5 mm |
| 8.25 | P½ | 57.1 | 17 | 17 | 18.3 mm | 57.1 mm |
| 8.5 | Q | 57.7 | 17 | 17.75 | 18.5 mm | 57.7 mm |
| 8.75 | Q½ | 58.3 | 18 | 18.25 | 18.7 mm | 58.3 mm |
| 9 | R | 59 | 19 | 19 | 18.9 mm | 59 mm |
| 9.25 | R½ | 59.6 | 19 | 19.5 | 19.1 mm | 59.6 mm |
| 9.5 | S | 60.2 | 20 | 20.25 | 19.2 mm | 60.2 mm |
| 9.75 | S½ | 60.8 | 21 | 20.75 | 19.4 mm | 60.8 mm |
| 10 | T | 61.5 | 22 | 21.5 | 19.6 mm | 61.5 mm |
| 10.25 | T½ | 62.1 | 22 | 22 | 19.8 mm | 62.1 mm |
| 10.5 | U | 62.7 | 23 | 22.75 | 20 mm | 62.7 mm |
| 10.75 | U½ | 63.3 | 23 | 23.25 | 20.2 mm | 63.3 mm |
| 11 | V | 64 | 24 | 24 | 20.4 mm | 64 mm |
| 11.25 | V½ | 64.6 | 24 | 24.5 | 20.6 mm | 64.6 mm |
| 11.5 | W | 65.2 | 25 | 25.25 | 20.8 mm | 65.2 mm |
| 11.75 | W½ | 65.8 | 26 | 25.75 | 21 mm | 65.8 mm |
| 12 | X | 66.5 | 27 | 26.5 | 21.2 mm | 66.5 mm |
| 12.5 | Y | 67.7 | 28 | 27.75 | 21.6 mm | 67.7 mm |
| 13 | Z | 69 | 29 | 29 | 22 mm | 69 mm |
| 13.5 | Z+1 | 70.2 | 30 | 30.25 | 22.3 mm | 70.2 mm |
| 14 | Z+2 | 71.5 | 31 | 31.5 | 22.6 mm | 71.5 mm |
| 14.5 | Z+3 | 72.7 | 32 | 32.75 | 23 mm | 72.7 mm |
| 15 | Z+4 | 74 | 33 | 34 | 23.4 mm | 74 mm |
Click any column header to sort. Use the search bar to find specific sizes.
How to Read This Chart
Find Your Known Size
Look for your current ring size in the column for the system you already know (e.g., US, UK, or EU).
Read Across the Row
Follow the row horizontally to find the equivalent size in any other system, including diameter and circumference.
Sort & Filter
Click column headers to sort, use the search bar to find specific values, or filter by size range.
Most Common Ring Sizes
Women's Sizes
The most popular women's ring sizes are US 5 to 7(UK J–N, EU 49–54). Size 6 (UK L, EU 51.5) is the single most common size for women's engagement and wedding rings.
Men's Sizes
The most popular men's ring sizes are US 8 to 11(UK P–V, EU 56.5–64). Size 10 (UK T, EU 61.5) is the most common for men's wedding bands.
Frequently Asked Questions
How do I read a ring size chart?
A ring size chart lists equivalent sizes across different sizing systems. Find your known size in one column, then read across the row to see the equivalent in other systems. For example, a US size 7 equals UK size N, EU size 54, and has a diameter of 17.3 mm.
What is the difference between ring diameter and circumference?
Diameter is the straight-line distance across the inside of a ring (measured in mm). Circumference is the total distance around the inside of the ring. Circumference equals diameter multiplied by π (approximately 3.14159). Both measurements can be used to determine ring size.
Are men's and women's ring sizes measured the same way?
Yes, ring sizes are universal regardless of gender. The same sizing systems (US, UK, EU, etc.) apply to both men's and women's rings. The only difference is the typical size range — women usually wear sizes 4–8 (US) while men typically wear sizes 8–12 (US).
How can I print this ring size chart?
You can print this page directly from your browser using Ctrl+P (or Cmd+P on Mac). The chart is designed to be print-friendly. For a dedicated printable ring measurement tool, visit our Printable Ring Sizer page.