Adjacent to this text is a table showing Imperial ring sizes ranging from M to S and their corresponding US ring size. In addition are measurements for ring diameter and inside circumference in both inches and millimetres.
It is important when choosing a ring to find a size that fits comfortably on the finger; not too tight but not so loose that you risk the ring slipping off your finger. Look for a snug fit, the ring should just fit over the largest part of the finger, usually the knuckle. You should also note that your ring size will increase in hot temperatures and high humidity. Keep this information in mind when choosing your ring whether for yourself or as a gift
Sizes
|
Inside diameter
|
Inside circumference
|
|||
Imperial
United Kingdom, Ireland and Australia
|
United States and Canada
|
inches
|
millimetres
|
inches
|
millimetres
|
M
|
6 1/4
|
0.658
|
16.71
|
2.07
|
52.5
|
N
|
6 3/4
|
0.674
|
17.12
|
2.12
|
53.8
|
O
|
7 1/4
|
0.69
|
17.53
|
2.17
|
55.1
|
P
|
7 3/4
|
0.706
|
17.93
|
2.22
|
56.3
|
Q
|
8 1/4
|
0.722
|
18.34
|
2.27
|
57.6
|
R
|
8 3/4
|
0.738
|
18.75
|
2.32
|
58.9
|
S
|
9 1/4
|
0.754
|
19.15
|
2.37
|
60.2
|
