The right fit makes a piece feel like it was made for you. Explore our ring, bracelet and necklace measurements, with simple ways to measure at home.
Ring Size Guide
International ring size conversions
US / Canada
UK / AU
Diameter (mm)
Circumference (mm)
3
F
14.1
44.2
3.5
G ½
14.5
45.5
4
H ½
14.9
46.8
4.5
I ½
15.3
48.0
5
J ½
15.7
49.3
5.5
L
16.1
50.6
6
M
16.5
51.9
6.5
N
16.9
53.1
7
O
17.3
54.4
7.5
P
17.7
55.7
8
Q
18.1
57.0
8.5
R
18.5
58.3
9
S
18.9
59.5
9.5
T
19.4
60.8
10
T ½
19.8
62.1
10.5
U ½
20.2
63.4
11
V ½
20.6
64.6
11.5
W ¾
21.0
65.9
12
Y
21.4
67.2
12.5
Z
21.8
68.5
13
Z+1
22.2
69.7
Conversions are approximate. EU / ISO sizes refer to inside circumference in whole millimeters. Band width and ring design can affect the fit; check the product's available sizes.
Your personal size finder
Enter your finger circumference, or adjust the slider to find your fit.
Between sizes, choose the larger size. Your suggested fit is highlighted below.
Your suggested fit
7US / CanadaOUK / AU54EU / ISO ≈
Find Your Ring Size
01 · Measure your finger
The paper strip method
Wrap a narrow paper strip or non-stretch string snugly around the base of your finger. It should slide over your knuckle without squeezing.
Mark where the strip overlaps, then lay it flat against a ruler.
Measure from the start to your mark in millimeters. Enter that circumference in the size finder.
02 · Measure a ring you love
The existing ring method
Choose a ring that fits the same finger well. Measure straight across its inside edge, or place it over a printed circular outline and match the inside diameter.
Illustrations on your screen are not life-size. Print the outline sheet at 100% / Actual Size, then verify its 50 mm scale line with a ruler before measuring.
AMU GEMS · CLIENT SERVICES
Let Us Help You Find Your Fit
Choosing a gift or unsure of your measurements? Our concierge can help with ring sizes, bracelet fit and the right chain length.
