Ring Size Guide
Choosing the correct ring size is essential to ensure your custom milestone jewelry fits perfectly. At Merovow, we use standard Ring Sizes.
If you are between sizes, we strongly recommend choosing the larger size.
1. International Ring Size Conversion Chart
Please use the table below to find your US size based on the inside diameter or inside circumference of your finger.
| US Size | Inside Diameter (mm) | Inside Circumference (mm) |
| 5 | 15.70 mm | 49.32 mm |
| 5.5 | 16.10 mm | 50.58 mm |
| 6 | 16.51 mm | 51.87 mm |
| 6.5 | 16.92 mm | 53.16 mm |
| 7 | 17.32 mm | 54.44 mm |
| 7.5 | 17.73 mm | 55.73 mm |
| 8 | 18.14 mm | 56.99 mm |
| 8.5 | 18.54 mm | 58.21 mm |
| 9 | 18.95 mm | 59.50 mm |
| 9.5 | 19.35 mm | 60.79 mm |
| 10 | 19.76 mm | 62.08 mm |
| 10.5 | 20.17 mm | 63.37 mm |
| 11 | 20.57 mm | 64.62 mm |
| 11.5 | 20.98 mm | 65.91 mm |
| 12 | 21.39 mm | 67.20 mm |
| 12.5 | 21.79 mm | 68.49 mm |
| 13 | 22.20 mm | 69.74 mm |
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2. How to Measure Your Ring Size at Home
If you do not know your size, follow these three simple steps to measure your finger:
Step 1: Wrap It: Wrap a piece of non-elastic string or a thin strip of paper comfortably around the base of the finger you intend to wear the ring on.
Step 2: Mark It: Use a pen to mark the exact point where the string or paper overlaps to form a complete circle.
Step 3: Measure It: Lay the string or paper flat against a ruler and measure the distance in millimeters (mm). This measurement gives you the Inside Circumference. Compare it to our chart above to find your US size.

đŸ’¡ Pro Tips for Perfect Accuracy
Temperature Matters: Fingers tend to expand slightly in the evening or when it is warm. For the most accurate result, measure your finger at the end of the day when your hands are warm.
Account for Knuckles: If your knuckle is significantly larger than the base of your finger, measure both the base and the knuckle, then choose a size right in the middle.
Need Expert Assistance?
If you are still unsure about your size or need help with a custom graduation or championship ring layout, please feel free to reach out to our support team at service@merovow.com. We are always here to help you get the perfect fit!
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