Prepare Your Materials
Use a flexible measuring tape, or a thin strip of paper/string, a pen, and a ruler.
Avoid using stretchy materials, as they can lead to inaccurate measurements.
Measure Your Ring Size Easily at Home
Discover the ideal ring size with our comprehensive guide. Whether measuring at home or using an existing ring, we'll help you find the perfect fit.
Measure by Your Own
Measure your ring size yourself using simple tools at home.
Required
Materials
Paper or string
Pen or marker
Ruler
Wrap Around Your Finger
Wrap the tape or string around the base of the finger you plan to wear the ring on. Make sure it's snug but comfortable.
Mark the Overlap
If using string or paper, mark the point where the ends meet with a pen.
Measure the Length in millimeters
Lay the string flat and measure the length in millimeters. Compare to our size chart below.
Measure an Existing Ring
Use a ring that already fits comfortably as a reference to find your correct size.
Required
Materials
Ring
Ruler
Prepare your materials
Get your ring and a ruler ready before you begin measuring.
Measure the ring’s inside diameter
Place the ring on a flat surface and measure the inside diameter using a ruler or caliper, making sure to measure straight across the center for an accurate size.
Measure with Ring Sizer tool
Use a ring sizer tool to quickly find your size
Required
Materials
Ring Sizer
Put the ring sizer on your intended finger
Put the ring sizer measurement tool as a ring on an intended finger.
Pull the end to fit the finger
Gently pull the end of the sizer to tighten it. The ring sizer should feel snug but comfortable, not too tight.
Check if it fit the knuckle
Move the ring sizer across your knuckle to ensure it can slide over smoothly.
Check Your Ring Size
Look at the number indicated on the ring sizer.
Ring Size Guide
With our ring size guide, you can confidently select the perfect size, whether you're shopping for yourself or planning a surprise for your loved one.
Find the ring size faster
OR
Circum- ference (MM)Circumference (MM)
Diameter (MM)Ring Diameter (MM)
UKUK Sizes
USUS Sizes
EUEU Sizes
JPJapan Sizes
41
13.05
C½
1¾
41
1
42
13.37
D½
2¼
42
2
43
13.69
E
2½
43
3
44
14.01
F
3
44
4
45
14.32
F½
3¼
45
5
46
14.64
G½
3¾
46
6
47
14.96
H
4
47
7
48
15.28
I
4½
48
8
49
15.60
J
5
49
9
50
15.92
J½
5¼
50
10
51
16.23
K½
5¾
51
11
52
16.55
L
6
52
12
53
16.87
M
6½
53
13
54
17.19
M½
6¾
54
14
55
17.51
N½
7¼
55
15
56
17.83
O½
7¾
56
16
57
18.14
P
8
57
17
58
18.46
Q
8½
58
18
59
18.78
Q½
8¾
59
19
60
19.10
R½
9¼
60
20
61
19.42
S
9½
61
21
62
19.74
T
10
62
22
63
20.05
U
10½
63
23
64
20.37
U½
10¾
64
24
65
20.69
V½
11¼
65
25
66
21.01
W
11½
66
26
67
21.33
X
12
67
27
68
21.65
X½
12¼
68
28
69
21.96
Y½
12¾
69
29
70
22.28
Z½
13¼
70
30
71
22.60
Z+1
13½
71
31
72
22.92
Z+2
14
72
32
73
23.24
Z+2½
14¼
73
33
74
23.55
Z+3½
14¾
74
34
75
23.87
Z+4
15
75
35
76
24.19
Z+5
15½
76
36
Note: Sizes may vary slightly between different ring styles and widths. When in doubt, select the larger size.
FAQs About Ring Size Guide
Our GIA-certified experts recommend measuring ring size by wrapping a 1 cm-wide strip of paper around the base of your finger, marking the overlap, then comparing the length to our printable chart. Measure warm hands midday for best accuracy.
iDiamond follows the international US ring size scale and lists the UAE equivalent beside each product. To convert, match your inner-diameter in millimetres to the chart’s US letter, then read the adjacent UAE number.
Finger size can change up to half a size with temperature, salt intake or pregnancy. Measure when hands are neither too cold nor swollen; evening readings are usually most reliable, note our gemologists.
Yes—resizing is available for life where technically possible without creating an entirely new piece, subject to technical assessment. If you’re unsure, order the closest size and we’ll assess an adjustment after proposal.
Absolutely. Download our free printable ring-size guide or request a satin gauge at checkout; we’ll include it with your order.
To order the correct size online, select your size from the dropdown, add to cart, and complete secure checkout; we’ll craft and deliver your ring free across the UAE, normally within 2–3 business days of final approval and payment.
Need help?Book a virtual sizing appointmentiDiamond blends Dubai craftsmanship with precise digital sizing, IGI or GIA-certified quality checks, and complimentary resizing. Our concierge team ensures a flawless fit, free delivery, and lifelong after-care for every ring.
