Ring Size Guide
Conversion Tool
Use this tool to convert your measurement to a US ring size.
How to Measure Your Ring's Inner Diameter
Accurately measuring the inner diameter of your ring is essential for finding the perfect fit. Here’s how you can do it:
- Gather Your Tools: Use a digital caliper for the most accurate measurement. If you don’t have one, a clear ruler and a steady hand can work too.
- Place Your Ring on a Flat Surface: Ensure your ring is on a stable, flat surface for an accurate reading.
- Measure the Inner Diameter: Gently close the caliper’s jaws until they just touch the inner edges of the ring. Read the measurement in millimeters (mm). If you’re using a ruler, measure the distance between the inner edges.
- Double-Check Your Measurement: Repeat the process a few times to ensure accuracy.
Remember, the inner diameter is key for converting to a US ring size. If you’re unsure, consider visiting a jeweler for professional sizing.
How to Measure Your Ring's Inside Circumference
Measuring the inside circumference of your ring can help you determine its size. Follow these steps:
- Tools Needed: A flexible measuring tape or a strip of paper and a ruler.
- Wrap the Tape or Paper: For a measuring tape, wrap it inside the ring so that it fits snugly without forcing it. Alternatively, wrap a strip of paper inside the ring and mark where it overlaps.
- Measure the Length: Use a ruler to measure the length of the tape or paper in millimeters (mm).
Ensure you measure inside circumference of the ring, not the outside circumference.
How to Measure Your Finger
One popular and easy way to measure your finger size at home is by using the string method. Follow these steps:
- Cut a Piece of String: Take a small piece of string (which is generally more accurate) or a thin strip of paper that’s long enough to wrap around your finger.
- Wrap It Around Your Finger: Wrap the string around the base of the finger where you plan to wear your ring. Ensure it’s snug but not too tight.
- Mark the Spot: Use a pen or marker to mark the point on the string where it meets the starting point.
- Measure the String: Lay the string flat and measure its length with a ruler in millimeters (mm). This measurement is your finger’s circumference.
- Convert Your Measurement: Use the ring sizing chart below or the conversion tool at the top of the page to determine your US ring size from your finger’s circumference.
The string method is a quick and cost-effective way to measure your finger size at home. For the most accurate results, consider having your finger measured by a professional jeweler.
Ring Size Conversion Chart (US 3–13)
| US | Inner Diameter (mm) | Inner Circumference (mm) |
UK/AUS/NZ | EU | HK |
|---|---|---|---|---|---|
| 3 | ~14.1 | ~44.14 | F | 44 | 5½ |
| 3.5 | ~14.4 | ~45.4 | G¼ | 45 | 6 |
| 4 | ~14.8 | ~46.68 | H½ | 46 | 7 |
| 4.5 | ~15.2 | ~47.97 | I½ | 48 | 8 |
| 5 | ~15.6 | ~49.32 | J½ | 49 | 9 |
| 5.5 | ~16.0 | ~50.58 | L | 50 | 10 |
| 6 | ~16.4 | ~51.87 | M | 52 | 12 |
| 6.5 | ~16.9 | ~53.16 | N | 53 | 13 |
| 7 | ~17.3 | ~54.51 | O | 54 | 14 |
| 7.5 | ~17.7 | ~55.76 | P | 56 | 15 |
| 8 | ~18.1 | ~57.15 | Q | 57 | 16 |
| 8.5 | ~18.5 | ~58.21 | Q¾ | 58 | 17 |
| 9 | ~18.9 | ~59.34 | R¾ | 60 | 18 |
| 9.5 | ~19.4 | ~60.98 | S¾ | 61 | 19 |
| 10 | ~19.8 | ~62.33 | T½ | 62 | 20 |
| 10.5 | ~20.2 | ~63.46 | U½ | 64 | 22 |
| 11 | ~20.6 | ~64.97 | V½ | 65 | 23 |
| 11.5 | ~21.0 | ~66.22 | W¾ | 66 | 24 |
| 12 | ~21.4 | ~67.51 | Y | 67 | 25 |
| 12.5 | ~21.8 | ~68.77 | Z | 68 | 26 |
| 13 | ~22.2 | ~70.15 | Z+1 | 70 | 27 |