Franco Pianegonda

Find your Size

There is no substitute for having your finger measured professionally, but it's not an exact science. Our fingers change in size from morning to evening, month to month and winter to summer.

Here are two important tips to assure an accurate ring size measurement:

  • Don't measure cold fingers, as this is when fingers are their smallest.
  • For the most accurate reading, measure the finger at the end of the day when the finger is the largest.

You have two ways to determine your ring size - either measuring your finger circumference or measuring the diameter of your current ring:

Determine your ring size by measuring circumference

  1. Wrap a string or piece of paper around your finger.
  2. Mark the point where the two ends meet.
  3. Measure the string or paper against a ruler.
  4. Find your measurement on the chart below to determine your ring size.

Generally 1/16 of an inch or 1 cm increases the ring size by ½ a size

INCHES CENTIMETERS UK USA EUROPE
1 3/4 4.6 G 3 3/4 14 3/4 & 46
1 13/16 4.7 H 4 15 & 47
1 7/8 4.8 I 4 1/2 15 1/2 & 48
1 15/16 4.9 J 5 16 & 49
2 5.1 K 5 1/2 16 1/4 & 51
2 1/16 5.2 L 6 16 1/2 & 52
2 1/8 5.3 M 6 1/2 17 & 53
2 3/16 5.4 N 7 17 1/4 & 54
2 1/4 5.6 O 7 1/2 17 3/4 & 56
2 5/16 5.7 P 8 8 1/4 & 57
2 3/8 5.8 Q 8 1/2 18 1/2 & 58
2 7/16 6.0 R 9 19 & 60
2 1/2 6.1 S 9 1/2 19 1/2 & 61
2 9/16 6.2 T 10 19 3/4 & 62
2 5/8 6.3 U 10 1/2 20 & 63
2 11/16 6.4 V 11 20 1/2 & 64
2 3/4 6.5 W 11 1/4 20 3/4 & 65
2 13/16 6.6 X 11 1/2 21 1/4 & 66
2 7/8 6.8 Y 12 21 3/4 & 68

Determine your ring size by measuring the diameter of your current ring (distance across in millimeters)

An example of measuring the diameter of a ring using the metric system of measurement:

Image

The inside of this ring is approximately 15 mm in diameter (millimeters)

The following chart is helpful to see how the sizes compare.

UK DIAMETER (mm) CIRCUMFERENCE (mm) AMERICAN
A 11.5 36.25 0.5
B 12.3 38.64 1
C 12.7 39.90 1.5
D 13.1 41.15 2
E 13.5 42.41 2.5
F 13.9 43.67 3
G 14.3 44.92 3.25
H 14.7 46.18 3.75
I 15.1 47.44 4.25
J 15.5 48.69 4.75
K 15.9 49.95 5.25
L 16.3 51.24 5.75
M 16.7 52.46 6.25
N 17.1 53.72 6.75
O 17.5 54.98 7
P 17.9 56.23 7.5
Q 18.3 57.49 8
R 18.7 58.75 8.5
S 19.1 60.00 9
T 19.5 61.26 9.5
U 19.9 62.52 10
V 20.3 63.77 10.5
W 20.7 65.00 11
X 21.1 66.29 11.5
Y 21.5 67.51 12
Z 21.9 68.77 12.5
Z+1 22.3 69.99
Z+2 22.7 71.31
Z+3 23.1 72.57
Z+4 23.5 73.83
Z+5 23.9 75.08
Z+6 24.3 76.34
Z+7 24.7 77.60
Z+8 25.1 78.86