Finding the right ring size shouldn't be a guessing game. Whether you're treating yourself or shopping for someone special, getting the fit right the first time saves you the hassle of returns — and ensures your piece feels as good as it looks.
Here are three easy methods you can do right now, no jeweller required.
Method 1: The String or Paper Strip Method
This is the most reliable at-home option.
- Cut a thin strip of paper or use a piece of string
- Wrap it snugly around the base of the finger you plan to wear the ring on
- Mark where the paper or string overlaps
- Measure the length in millimetres
- Use the chart below to find your size
Method 2: Measure an Existing Ring
Already have a ring that fits perfectly? Use it.
- Place the ring flat on a ruler
- Measure the inner diameter in millimetres
- Match it to the size chart below
Method 3: The Printable Ring Sizer
Many jewellers offer free printable ring sizers online. Simply print at 100% scale (do not scale to fit), cut out the sizer, and follow the instructions.
Quick Reference Size Chart
| Inner Diameter (mm) | Ring Size (CA/US) |
|---|---|
| 14.9 mm | 4 |
| 15.7 mm | 5 |
| 16.5 mm | 6 |
| 17.3 mm | 7 |
| 18.2 mm | 8 |
| 19.0 mm | 9 |
| 19.8 mm | 10 |
A Few Tips Before You Measure
- Fingers swell slightly in heat and shrink in cold — measure at room temperature
- Measure at the end of the day when fingers are at their largest
- If you're between sizes, size up
- For wide bands, go up half a size for comfort
At Pure Aurum&Co., we want every piece to feel like it was made for you. If you're ever unsure, reach out — we're happy to help you find your perfect fit.
The right ring, on the right finger. That's the goal.
What's your go-to method for finding your ring size?