This ring size chart in centimeters (cm) provides a clear and easy way to determine your correct ring size by measuring either the circumference of your finger or the inner diameter of a ring that already fits you well. The chart includes conversions between US, UK, and EU sizing systems, making it especially helpful for international shopping or gift-giving. Each row shows the corresponding ring size in five different formats: US size, circumference in cm, diameter in mm, UK size, and EU size. For example, a US size 6 ring has a circumference of 4.91 cm and a diameter of 15.6 mm, which corresponds to a UK size L½ and an EU size 49.0. This format ensures that regardless of where you’re shopping from or what sizing system the jeweler uses, you can easily match your measurements to the right size. The chart also makes it simple to compare sizes if you already know one measurement and need to convert it into another system. Whether you’re measuring your finger directly or using a ring you already own, this chart takes the guesswork out of finding a comfortable and accurate ring fit.
International Ring Size Conversion Chart for Men and Women
| US Size | Women’s Size | Men’s Size | UK Size | EU Size | Diameter (mm) | Diameter (cm) | Circumference (mm) | Circumference (cm) |
|---|---|---|---|---|---|---|---|---|
| 3 | ✅ | F½ | 41.4 | 13.2 | 1.32 | 41.4 | 4.14 | |
| 4 | ✅ | H½ | 44.0 | 14.0 | 1.40 | 44.0 | 4.40 | |
| 5 | ✅ | J½ | 46.5 | 14.8 | 1.48 | 46.6 | 4.66 | |
| 6 | ✅ | L½ | 49.0 | 15.6 | 1.56 | 49.1 | 4.91 | |
| 7 | ✅ | N½ | 51.6 | 16.4 | 1.64 | 51.6 | 5.16 | |
| 8 | ✅ | ✅ | P½ | 54.1 | 17.2 | 1.72 | 54.1 | 5.41 |
| 9 | ✅ | R½ | 56.6 | 18.0 | 1.80 | 56.6 | 5.66 | |
| 10 | ✅ | T½ | 59.1 | 18.8 | 1.88 | 59.1 | 5.91 | |
| 11 | ✅ | V½ | 61.6 | 19.6 | 1.96 | 61.6 | 6.16 | |
| 12 | ✅ | X½ | 64.1 | 20.4 | 2.04 | 64.1 | 6.41 | |
| 13 | ✅ | Z½ | 66.1 | 21.2 | 2.12 | 66.6 | 6.66 | |
| 14 | ✅ | Z+3 | 69.2 | 22.0 | 2.20 | 69.2 | 6.92 | |
| 15 | ✅ | Z+6 | 71.8 | 22.8 | 2.28 | 71.8 | 7.18 |
This international ring size chart provides a comprehensive comparison of ring sizes commonly worn by both women and men, with separate columns indicating typical usage. Sizes are shown in US, UK, and EU standards, along with the corresponding inner diameter and circumference in both millimeters and centimeters. While ring sizes are unisex, women typically wear US sizes 3–8 and men usually wear sizes 8–15. The chart helps users accurately determine their size when shopping across different countries or brands, ensuring a proper fit by matching measurements to regional size systems.
Want to find your ring size?
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Prefer a physical option? Download our printable ring sizer and measure your ring size at home with step-by-step instructions.