Ring Sizing Chart

The RW LONDON is based in the United Kingdom and we use the UK  alphabetic sizing system measured from the center-back of the band. Please use the following chart as a guide to converting your international size to the nearest UK size.

We strongly encourage you to check your ring size carefully before placing your order. Make sure in which hand you want to wear the ring on, the temperature the day can also affect your size.

Personal comfort is also a factor. An experienced jewelry store assistant should be able to advise you whilst you are being measured.

All sizing is based on the internal ring diameter (across the middle). Our online products are displayed in UK sizes. If you don't know your UK size, see the below conversion chart:

UK EU USA JAPAN Ring's
Diamete
(mm)
Finger
Circumferenc
(mm)
F ½ 44 3 4 14.1 44.2
G 45 3 5 14.3 44.8
G ½   3 ½   14.5 45.5
H 46   6 14.7 46.1
H ½ 47 4 7 14.9 46.8
I       15.1 47.4
I ½ 48 4 ½ 8 15.3 48.0
J       15.5 48.7
J ½ 49 5 9 15.7 49.3
K 50     15.9 50.0
K ½   5 ½ 10 16.1 50.6
L 51     16.3 51.2
L ½ 52 6 11 16.5 51.9
M     12 16.7 52.5
M ½ 53 13 16.9 53.1
N       17.1 53.8
N ½ 54 7 14 17.3 54.4
O 55     17.5 55.1
O ½   7 ½ 15 17.7 55.7
P 56     17.9 56.3
P ½ 57 8 16 18.1 57.0
Q       18.3 57.6
Q ½ 58 8 ½ 17 18.5 58.3
R 59     18.8 58.9
R ½   9 18 19 59.5
S 60     19.2 60.2
S ½ 61 9 ½ 19 19.4 60.8
T       19.6 61.4
T ½ 62 10 20 19.8 62.1
U     21 20.0 62.7
U ½ 63 10 ½ 22 20.2 63.4
V 64     20.4 64.0
V ½   11 23 20.6 64.6
W 65     20.8 65.3
W ½ 66 11 ½ 24 21.0 65.9
X       21.2 66.6
X ½ 67 12 25 21.4 67.2
Y       21.6 67.8
Z 68 12 ½ 26 21.8 68.5
Z ½ 69     22.0 69.1
  70 13 27 22.2 69.7
Z+1 71     22.4 70.4
Z+2   13 ½   22.6 71.0