How to Measure Ring Size
Discover professional techniques for measuring ring size. Our ring size guide provides step-by-step instructions, expert tips, and a complete ring size chart to help you find the perfect fit every time.
How to Measure Ring Size: 4 Proven Methods
Choose the best method to measure ring size accurately
Step-by-Step Instructions:
- 1Cut a thin strip of paper or use string about 6 inches long
- 2Wrap it around the base of your finger where the ring will sit
- 3Mark where the paper/string overlaps with a pen
- 4Measure the marked length with a ruler in millimeters
- 5Use our size chart below to find your ring size
Pro Tip: Best done when fingers are at normal temperature, not too cold or hot.
Step-by-Step Instructions:
- 1Download and print our ring sizer at 100% scale
- 2Cut out the ring sizer along the dotted lines
- 3Insert the pointed end through the slot
- 4Slide onto your finger and adjust until comfortable
- 5Read the size where the sizer overlaps
Pro Tip: Ensure your printer is set to 'Actual Size' or 100% scale for accuracy.
Step-by-Step Instructions:
- 1Find a ring that fits the intended finger well
- 2Measure the inside diameter of the ring in millimeters
- 3Use a ruler or caliper for the most accurate measurement
- 4Compare the measurement to our ring size chart
- 5Consider the width of the new ring (wider rings need larger sizes)
Pro Tip: This method works best with rings of similar width and style.
Printable Ring Sizer
Download and print our professional ring sizing tool
Important Printing Instructions
- • Print this page at 100% scale (no scaling)
- • Use standard 8.5" x 11" paper
- • Verify the test ruler on the page measures exactly 2 inches
How to Use:
- 1.Cut out the ring sizer strip below
- 2.Insert the pointed end through the slot
- 3.Wrap around your finger and find your size
- 4.Ensure the fit is snug but comfortable
International Ring Size Chart
Convert between US, UK, European, Chinese, and Japanese ring sizes. All measurements are in millimeters.
| US Size | UK Size | EU Size | CN Size | JP Size | Circumference (mm) | Diameter (mm) |
|---|---|---|---|---|---|---|
| 3 | F | 44 | 4 | 4 | 44.2 | 14.1 |
| 3.5 | G | 45 | 6 | 6 | 45.5 | 14.5 |
| 4 | H | 46 | 7 | 7 | 46.8 | 14.9 |
| 4.5 | I | 47 | 8 | 8 | 48.0 | 15.3 |
| 5 | J | 48 | 9 | 9 | 49.3 | 15.7 |
| 5.5 | K | 50 | 10 | 10 | 50.6 | 16.1 |
| 6 | L | 51 | 11 | 11 | 51.9 | 16.5 |
| 6.5 | M | 52 | 12 | 12 | 53.1 | 16.9 |
| 7 | N | 54 | 14 | 14 | 54.4 | 17.3 |
| 7.5 | O | 55 | 15 | 15 | 55.7 | 17.7 |
| 8 | P | 56 | 16 | 16 | 57.0 | 18.1 |
| 8.5 | Q | 58 | 17 | 17 | 58.3 | 18.5 |
| 9 | R | 59 | 18 | 18 | 59.5 | 18.9 |
| 9.5 | S | 60 | 19 | 19 | 60.8 | 19.4 |
| 10 | T | 62 | 20 | 20 | 62.1 | 19.8 |
| 10.5 | U | 63 | 21 | 21 | 63.4 | 20.2 |
| 11 | V | 64 | 22 | 22 | 64.6 | 20.6 |
| 11.5 | W | 66 | 23 | 23 | 65.9 | 21.0 |
| 12 | X | 67 | 24 | 24 | 67.2 | 21.4 |
How to Use This Chart:
- • If you measured circumference, find the closest match in the "Circumference" column
- • If you measured diameter, find the closest match in the "Diameter" column
- • Round up to the next size if you're between measurements
- • Consider going up a half size for wide bands (over 6mm)
- • Chinese (CN) and Japanese (JP) sizes follow the same numbering system
Expert Tips for Perfect Ring Sizing
Professional jeweler insights to ensure you get the most accurate measurement possible
Measure your finger at the end of the day when it's at its largest. Fingers can swell throughout the day due to activity and temperature changes.
Cold fingers shrink and hot fingers swell. Measure at room temperature for the most accurate results. Avoid measuring right after exercise or in extreme temperatures.
Wide bands (6mm+) feel tighter than thin bands. Go up a half size for rings wider than 6mm. Comfort fit rings may require going down a quarter size.
If buying an expensive ring, consider getting professionally sized at a jewelry store. They can account for factors like knuckle size and ring style.
Common Ring Sizing Mistakes to Avoid
- ×Measuring when fingers are cold or swollen
- ×Using a ring from a different finger
- ×Not accounting for knuckle size
- ✓Measure multiple times for consistency
- ✓Consider the specific finger and hand
- ✓Account for ring width and style
Frequently Asked Questions
Get answers to the most common ring sizing questions from our jewelry experts