How to Measure Your Ring Size Accurately
Finding the perfect ring fit is essential, whether you're shopping for a custom engagement ring, wedding band, or a stylish statement piece. Use this easy ring sizing guide to ensure your ring fits comfortably and securely.
Option 1: Measure an Existing Ring
One of the simplest ways to determine your ring size is by measuring the internal diameter of a ring that already fits you well. Follow these steps:
✔ Find a ring that fits your finger comfortably.
✔ Use a ruler to measure the inside diameter in millimeters (mm).
✔ Compare your measurement with the ring size chart below.
Option 2: Measure Your Finger
If you don’t have a ring to measure, you can determine your size using a string or paper strip for a precise fit.
1: cut a piece of string or thin strip of paper (about 6 inches long).
2: Wrap it snugly around the base of your finger—make sure it's tight but not stretching.
3: Mark where the string or paper meets and measure the length in millimeters (mm) with a ruler.
4: Match your finger measurement to the closest circumference on the ring size chart below.
Pro Tip: Finger sizes can fluctuate throughout the day. For the most accurate measurement, measure your finger at the end of the day when it's slightly larger.
Now you’re ready to shop for your dream engagement ring, wedding band, or custom-made ring with confidence!
If you already know your size, please convert to the USA size below:
|
CIRCUMFERENCE (MM) |
DIAMETER (MM) |
USA & CANADA |
EUROPE |
UK |
ASIA |
|
42 |
13.3 |
2 |
42 |
E |
4 |
|
43 |
13.7 |
2.50 |
43 |
E.5 |
5 |
|
44 |
14.1 |
3 |
44 |
F |
5.5 |
|
45 |
14.3 |
3.25 |
45 |
G |
6 |
|
|
14.5 |
3.50 |
|
|
|
|
46 |
14.7 |
3.75 |
46 |
H |
7 |
|
47 |
14.9 |
4 |
47 |
H.5 |
7.5 |
|
|
15.1 |
4.25 |
|
|
8 |
|
48 |
15.3 |
4.50 |
48 |
I.5 |
8.5 |
|
49 |
15.5 |
4.75 |
49 |
J.5 |
9 |
|
|
15.7 |
5 |
|
|
|
|
50 |
15.9 |
5.25 |
50 |
K |
10 |
|
|
16.1 |
5.50 |
|
|
|
|
51 |
16.3 |
5.75 |
51 |
L |
11 |
|
52 |
16.5 |
6 |
52 |
L.5 |
12 |
|
53 |
16.7 |
6.25 |
53 |
M.5 |
13 |
|
|
16.9 |
6.50 |
|
|
|
|
54 |
17.1 |
6.75 |
54 |
N.5 |
14 |
|
|
17.3 |
7 |
|
|
|
|
55 |
17.5 |
7.25 |
55 |
O |
15 |
|
56 |
17.7 |
7.50 |
56 |
P |
16 |
|
|
17.9 |
7.75 |
|
|
|
|
57 |
18.1 |
8 |
57 |
P.5 |
17 |
|
58 |
18.3 |
8.25 |
58 |
Q.5 |
18 |
|
|
18.5 |
8.50 |
|
|
|
|
59 |
18.8 |
8.75 |
59 |
R |
19 |
|
60 |
19.0 |
9 |
60 |
S |
20 |
|
|
19.2 |
9.25 |
|
|
|
|
61 |
19.4 |
9.50 |
61 |
S.5 |
21 |
|
|
19.6 |
9.75 |
|
|
|
|
62 |
19.8 |
10 |
62 |
T.5 |
22 |
|
63 |
20.0 |
10.25 |
63 |
U.5 |
23 |
|
|
20.2 |
10.50 |
|
|
|
|
64 |
20.4 |
10.75 |
64 |
V |
24 |
|
65 |
20.6 |
11 |
65 |
W |
25 |
|
|
20.8 |
11.25 |
|
|
|
|
66 |
21.0 |
11.50 |
66 |
W.5 |
26 |
|
67 |
21.2 |
11.75 |
67 |
X.5 |
27 |
|
|
21.4 |
12 |
|
|
|
|
68 |
21.6 |
12.25 |
68 |
Z |
28 |
|
69 |
21.8 |
12.50 |
69 |
12.5 |
29 |
|
|
22.0 |
12.75 |
|
|
|
|
70 |
22.2 |
13 |
70 |
|
30 |
Option 2: Measure Your Finger with a Measuring Tape
If you have a flexible measuring tape at home, this is one of the most accurate ways to determine your ring size. Follow these simple steps to ensure a perfect ring fit:
Step-by-Step Guide:
Find a flexible measuring tape with millimeter (mm) markings.
1: Wrap it snugly around the base of your finger, ensuring it's not too tight or too loose. A snug but comfortable fit is ideal. Finding the perfect size ensures a flawless fit for stunning rings like our 209 Custom-Made Unique Oval Cut Ruby Center Stone and Heart Diamond Side Three-Stone Engagement Ring.
2: Take note of the number where the tape meets the 0 mark—this is your finger circumference in mm.
3: Match your measurement with the ring size chart below.
4: If your tape only shows centimeters (cm), use an online CM to MM converter to get the most precise millimeter reading. This ensures a perfect fit for exquisite rings like our 179 Custom-Made Unique Cushion Cut Yellow Sapphire Center Stone and Pear Cut Diamond Accents Three-Stone Engagement Ring.
Expert Tips for Accurate Ring Sizing:
✔ Measure your finger at room temperature—extreme heat or cold can affect size.
✔ Avoid measuring after consuming salty foods or alcohol—they can cause temporary swelling.
✔ Between sizes? Size up! It's easier to resize a ring smaller than to enlarge it. Ensure the perfect fit for stunning rings like our 193 Custom-Made Unique Emerald Cut Yellow Sapphire Center Stone and Emerald Cut Diamond Accents Three-Stone Engagement Ring.
✔ Need help? Our expert jewelers are available to assist with ring sizing questions.
Find the perfect fit for your engagement ring, wedding band, or custom-made ring today!