MADE TO ORDER | 0% FINANCE AVAILABLE | DESIGNED IN THE UK
Ring Sizes
Finding the perfect fit for your ring is essential for comfort and security. At Midnight Diamonds, we use a bespoke ring sizing system, so please refer to our unique size chart below. This system corresponds to UK ring sizes, ensuring a familiar reference point for our customers. While online tools and mobile apps can be a great starting point for measuring your size, it’s important to remember that their accuracy can vary. We highly recommend using a reputable ring sizing app or our printable guide to get the most precise measurement possible. However, we understand that finding the exact size can be challenging, which is why we offer a convenient resizing service for a small fee plus postage and packaging. This way, you can purchase with confidence, knowing that your Midnight Diamonds ring will fit you perfectly.
Download Size Guide – HERE
Stage 1: Preparation
Gather your measurement tools:
A thin strip of paper (about 1cm wide) or a piece of non-stretchy string.
A pen or marker.
A ruler with millimeter (mm) markings.
Stage 2: Measuring the Circumference
Wrap: Wrap the paper or string around the base of the finger you want to measure.
Fit: Make sure it is snug but comfortable—exactly how you’d want a ring to feel.
Check Knuckles: Slide the wrap up to your knuckle. If it’s too tight to pass over the knuckle easily, loosen your wrap slightly and re-measure.
Mark: Use your pen to mark the exact point where the paper or string overlaps.
Stage 3: Determining Your MD Size
Lay the paper flat against your ruler and measure the distance from the start to your mark in millimeters (mm). This is your circumference. Use the table below to find your MD Size:
| MD Size | UK Size | Internal Diameter (mm) | Circumference (mm) |
| 6 | H | 14.6 mm | 45.9 mm |
| 7 | I | 15.0 mm | 47.1 mm |
| 8 | J | 15.3 mm | 48.0 mm |
| 9 | J ½ | 15.6 mm | 49.0 mm |
| 10 | K | 15.9 mm | 50.0 mm |
| 11 | L | 16.2 mm | 50.9 mm |
| 12 | M | 16.6 mm | 52.2 mm |
| 13 | N | 16.9 mm | 53.1 mm |
| 14 | O | 17.2 mm | 54.1 mm |
| 15 | P | 17.5 mm | 55.0 mm |
| 16 | P ½ | 17.8 mm | 56.0 mm |
| 17 | Q | 18.2 mm | 57.2 mm |
| 18 | R | 18.5 mm | 58.1 mm |
| 19 | S | 18.8 mm | 59.1 mm |
| 20 | T | 19.1 mm | 60.0 mm |
| 21 | U | 19.4 mm | 61.0 mm |
| 22 | V | 19.7 mm | 61.9 mm |
| 23 | W | 20.1 mm | 63.2 mm |
| 24 | X | 20.4 mm | 64.1 mm |
| 25 | Y | 20.7 mm | 65.1 mm |
Pro-Tips for Accuracy
Time of Day: Fingers tend to swell slightly throughout the day. For the best fit, measure in the evening when your fingers are at their largest.
Temperature: Never measure when your hands are cold; your fingers can be up to half a size smaller than usual.
Download Size Guide – HERE
