RING SIZE GUIDE
Find your perfect fit with our simple ring measuring guide.
FINDING YOUR RING SIZE
Choosing the correct ring size is essential for both comfort and security. Your ring should fit comfortably over the knuckle while remaining secure enough that it does not easily slip from your finger.
There are two simple ways to determine your size: measure a ring that already fits you well, or measure your finger directly.
Use the methods below and compare your measurement with our international ring size chart to find the best fit.
METHOD 1 - MEASURE AN EXISTING RING
If you already have a ring that fits the intended finger correctly, measuring its inside diameter is one of the easiest ways to determine your ring size.
Place the ring on a flat surface and measure straight across the center from inside edge to inside edge in millimeters.
Do not include the thickness of the ring itself in your measurement.
Once you have the inside diameter, use the size chart below to find the corresponding ring size.
METHOD 2 - MEASURE YOUR FINGER
If you do not have an existing ring to measure, you can measure the circumference of your finger.
Wrap a thin strip of paper or flexible measuring tape around the base of the finger where the ring will sit. It should feel comfortable and secure without being pulled too tightly.
Mark the point where the ends meet, then lay the strip flat and measure its length in millimeters.
This measurement is your finger circumference. Use the chart below to find the corresponding ring size.
INTERNATIONAL RING SIZE CHART
Use your measurement to find the closest corresponding ring size below.
Inside Diameter is the measurement across the inside of an existing ring, while Circumference is the measurement around your finger.
INTERNATIONAL RING SIZE CHART
Use your measurement to find the closest corresponding ring size below. Inside Diameter is the measurement across the inside of an existing ring, while Circumference is the measurement around your finger.
| EU Size | Inside Diameter | Circumference | US Size | UK Size |
|---|---|---|---|---|
| 48 | 15.3 mm | 48 mm | 4.5 | I ½ |
| 49 | 15.6 mm | 49 mm | 5 | J ½ |
| 50 | 15.9 mm | 50 mm | 5.25 | K |
| 51 | 16.2 mm | 51 mm | 5.5 | L |
| 52 | 16.6 mm | 52 mm | 6 | L ½ |
| 53 | 16.9 mm | 53 mm | 6.5 | M ½ |
| 54 | 17.2 mm | 54 mm | 7 | N |
| 55 | 17.5 mm | 55 mm | 7.25 | O |
| 56 | 17.8 mm | 56 mm | 7.5 | P |
| 57 | 18.1 mm | 57 mm | 8 | P ½ |
| 58 | 18.5 mm | 58 mm | 8.5 | Q ½ |
| 59 | 18.8 mm | 59 mm | 8.75 | R |
| 60 | 19.1 mm | 60 mm | 9 | S |
| 61 | 19.4 mm | 61 mm | 9.5 | S ½ |
| 62 | 19.7 mm | 62 mm | 10 | T ½ |
| 63 | 20.1 mm | 63 mm | 10.25 | U ½ |
| 64 | 20.4 mm | 64 mm | 10.5 | V |
| 65 | 20.7 mm | 65 mm | 11 | W |
International size conversions are approximate and may vary slightly between sizing systems. If you are unsure, contact us before placing your order.
TIPS FOR AN ACCURATE MEASUREMENT
Your finger size can change slightly throughout the day and with temperature, so a few simple precautions can help you get a more accurate measurement.
Measure your finger at normal room temperature and preferably later in the day, when your hands are neither particularly cold nor swollen.
Measure the intended finger more than once and make sure the ring will fit comfortably over your knuckle.
For wider bands, a slightly larger size may sometimes provide a more comfortable fit.
BETWEEN TWO SIZES?
If your measurement falls between two ring sizes, we generally recommend choosing the slightly larger size for a more comfortable fit.
We also offer half sizes, such as EU 54.5, allowing for a more precise fit when your measurement falls between standard sizes.
The ideal size can also depend on the width and design of the ring, as wider bands may feel tighter than thinner bands in the same size.
If you are uncertain, contact us with your measurement and the ring you are considering, and we will help you determine the most appropriate size.
ORDERING A RING AS A SURPRISE?
If the ring is a surprise and you cannot measure the recipient's finger directly, try borrowing a ring they already wear on the same finger and hand.
Measure the inside diameter of that ring and compare it with our sizing chart.
If that is not possible, contact us before ordering. Tell us what information you have, and we will help you choose the best starting size for the ring.
NOT SURE ABOUT YOUR SIZE?
Choosing the right size is important, especially when your ring is being made specifically for you.
If you are unsure about your measurement or need help converting between international ring sizes, send us your measurements and the ring you are interested in.
Our team will help you determine the appropriate size before your ring is made.
NOW FIND YOUR RING
Now that you know how to determine your ring size, explore our collection of lab-grown diamond engagement rings.
Choose your preferred diamond shape, carat weight, setting, gold color and ring size to create a ring that is right for you.