Ring Size Guide
Hearts Forever Showroom · 86 Hatton Garden, London EC1N 8QQ · info@heartsforever.co.uk
Why Ring Size Matters
A well-fitted ring should feel comfortable: snug enough not to fall off, but loose enough to slide over the knuckle without force. An incorrect size can mean discomfort, resizing costs, or even losing a cherished ring. Getting the right size ensures both comfort and peace of mind.
Methods to Measure Your Ring Size
1. Measure with String or Paper
- Wrap a thin strip of paper or string around the base of your finger.
- Mark where the ends meet.
- Measure the length with a ruler (in mm).
- Match the measurement to the size chart below.
2. Use an Existing Ring
Take a ring that fits well and measure the internal diameter. Compare it with the size chart.
3. Printable Ring Sizer
We’ve prepared a printable ring sizer you can download and use at home. Simply print it on A4 paper and follow the instructions.
📥 Download Ring Sizer PDFUK Ring Size Conversion Chart
| UK Size | Inside Diameter (mm) | Inside Circumference (mm) | US Size |
|---|---|---|---|
| H | 14.6 | 46 | 4 |
| I | 15.2 | 48 | 4.5 |
| J | 15.6 | 49 | 5 |
| K | 16.0 | 50 | 5.5 |
| L | 16.4 | 51.5 | 6 |
| M | 16.8 | 52.5 | 6.5 |
| N | 17.2 | 54 | 7 |
| O | 17.6 | 55 | 7.5 |
| P | 18.0 | 56.5 | 8 |
| Q | 18.4 | 57.5 | 8.5 |
| R | 18.8 | 59 | 9 |
| S | 19.2 | 60 | 9.5 |
| T | 19.6 | 61.5 | 10 |
| U | 20.0 | 62.5 | 10.5 |
| V | 20.4 | 64 | 11 |
| W | 20.8 | 65 | 11.5 |
| X | 21.2 | 66.5 | 12 |
| Y | 21.6 | 68 | 12.5 |
| Z | 22.0 | 69 | 13 |
Helpful Tips
Frequently Asked Questions
How do I know my partner’s ring size without asking?
You can borrow a ring they wear on the correct finger and measure its diameter, or ask a close friend or family member who may already know their size.
Can my ring be resized if it doesn’t fit?
Yes, most rings can be resized within 1–2 sizes depending on the design. Some intricate or eternity bands may be more difficult to resize, so it’s always best to ask us before purchase.
Does finger size change over time?
Yes, fingers can change slightly due to temperature, pregnancy, or weight fluctuations. This is why we recommend measuring at the end of the day for the most accurate fit.
What if I’m between two ring sizes?
It’s usually better to choose the larger size. A ring that is too tight can be uncomfortable, while a slightly loose ring can often be adjusted with a sizing bead or simple resize.
Is UK ring sizing the same as US sizing?
No. The UK uses letters (A–Z), while the US uses numbers (3–13+). Our chart above provides a simple conversion.
Final Thoughts
Your ring should be as timeless as the memories it represents. At Hearts Forever, we offer complimentary ring sizing with your purchase. Visit our showroom in Hatton Garden or contact us for personalised assistance.