method a:
How To Measure Your Ring
You'll need a thin strip of paper or a piece of non-stretch string.
- Wrap it comfortably around the base of the finger.
- Mark where the ends meet.
- Lay it flat and measure the length in millimetres.
- Divide this measurement by 3.14 to find the approximate diameter.
- Match this figure to the MM column in the ring size chart below.
Example: If your finger measures 54 mm around, 54 ÷ 3.14 = approximately 17.2 mm. Look for the closest measurement to 17.2 mm in the MM column.
Tip: Do not pull the paper or string too tightly - measure it at the fit you would want from your ring.
Tips For Measuring Ring Size Accuracy
method b:
How To Measure a Ring That Already Fits
If you already own a ring that fits the correct finger, this is the simplest method.
- Place the ring flat on a level surface.
- Measure straight across the inside of the ring, from inner edge to inner edge.
- Measure through the centre at the widest point.
- Match the measurement in millimetres to the MM column in the chart below.
UK Ring Size Chart
The MM and Inches measurements below refer to the inside diameter of the ring.
Use the calculated diameter from Method A or the inside diameter of an existing ring from Method B, then find the closest measurement in the chart.
| Inches | MM | UK Ring Size | US | EU |
|---|---|---|---|---|
| 0.52 | 12.84 | D | 2.23 | 41 |
| 0.53 | 13.57 | E | 2.75 | 42 |
| 0.55 | 13.97 | F | 3.25 | 44 |
| 0.56 | 14.38 | G | 3.75 | 45 |
| 0.58 | 14.88 | H | 4.25 | 46.5 |
| 0.59 | 15.10 | I | 4.5 | 47 |
| 0.60 | 15.49 | J | 5 | 48.5 |
| 0.62 | 15.90 | K | 5.5 | 50 |
| 0.64 | 16.31 | L | 6 | 51 |
| 0.65 | 16.71 | M | 6.5 | 52 |
| 0.67 | 17.12 | N | 6.75 | 53.5 |
| 0.69 | 17.53 | O | 7 | 55 |
| 0.70 | 17.96 | P | 7.5 | 56 |
| 0.72 | 18.34 | Q | 8 | 57 |
| 0.73 | 18.75 | R | 8.5 | 58.5 |
Measurements do not always fall exactly on a chart value. Choose the closest measurement and consider the fit of the particular ring if you are between sizes.
Why Getting the Right Ring Fit Matters
A ring should feel secure without being uncomfortable. It should slide over the knuckle with slight resistance and sit comfortably at the base of the finger.
Wider bands can feel tighter than narrow rings, so you may prefer a slightly larger size for some designs.
If you're between sizes, the best choice can depend on the ring style and width.
Frequently Asked Questions
Can a finger size change?
Yes - temperature, activity, time of day and even weather can cause fluctuations. That's why we recommend measuring at the end of the day and avoiding times when fingers are cold
How should a ring fit?
A well-fitting ring should feel secure at the base of the finger but still pass over the knuckle with gentle resistance. It should not pinch the skin or slide off easily.
Do wider rings fit more tightly?
Yes. Wider bands generally feel tighter than narrow bands on the same finger, so some people prefer a slightly larger size for wider ring styles.
My knuckle is wider than the base of my finger - what do I do?
Measure both knuckle and base circumference. Choose a size between the two or go for a "comfort fit" ring that's easier to slide over the knuckle.
I'm between sizes - should I go up or down?
Go up. It's easier to resize or adjust a slightly large ring than to stretch a tight one.
Are sizing systems the same worldwide?
No. UK uses letters, US uses numbers, and EU uses millimetres. That's why a reliable conversion chart is essential when buying internationally.
Printable Ring Sizer & Downloadable Chart
For another way to check your size, download our printable ring sizer and UK ring size chart.
Print the PDF at 100% / actual size and follow the instructions provided. Do not use “Fit to page” or other scaling options, as this can make the measurements inaccurate.
Ring size conversions are approximate. Sizing standards can vary slightly between countries and manufacturers, so use the UK size as the primary reference when ordering from Silversmiths.
Ready to Find Your Ring?
Once you know your size, explore our collection of genuine 925 sterling silver rings.