DIAMOND GRADING & RING SIZE CHARTS

Color Grades

GIA CIBJO UK Traditional
D Exceptional White + Finest White
E Exceptional White Finest White
F Rare White + Fine White
G Rare White Fine White
H White White
I Slightly Tinted White Commercial White
J Slightly Tinted White Top Silver Cape
K Tinted White Top Silver Cape
L Tinted White Silver Cape
M to N Tinted Color Light Cape
O to R Tinted Color Cape
R to Z Tinted Color Dark Cape

Clarity Grades

Grade Description Details
IF Internally Flawless No inclusions and only insignificant surface blemishes when viewed under 10X magnification.
VVS1-VVS2 Very, Very Slightly Included Minute inclusions that are incredibly difficult to see under 10X magnification.
VS1-VS2 Very Slightly Included Minor inclusions that range from difficult (VS1) to slightly easier (VS2) to see under 10X magnification.
SI1-2 Slightly Included Noticeable inclusions that are easily (SI1) or very easily (SI2) visible under 10X magnification.
I1-3 Obvious Inclusions Obvious inclusions that are easily visible under 10X magnification and may even be seen without magnification.

Ring Sizes

English Metric (mm) American French/Japanese
A 37.8252 ½ –
A ½ 38.4237 ¾ –
B 39.0222 1 –
B ½ 39.6207 1 ¼ –
C 40.2192 1 ½ –
C ½ 40.8177 1 ¾ –
D 41.4162 2 1
D ½ 42.0147 2 ¼ 2
E 42.6132 2 ½ –
E ½ 43.2117 2 ¾ 3
F 43.8102 3 4
F ½ 44.4087 3 ¼ –
G 45.0072 3 ¼ 5
G ½ 45.6057 3 ½ –
H 46.2042 3 ¾ 6
H ½ 46.8027 4 –
I 47.4012 4 ¼ 7
I ½ 47.9997 4 ½ 8
J 48.5982 4 ¾ –
J ½ 49.1967 5 9
K 49.7952 5 ¼ 10
K ½ 50.3937 5 ½ –
L 50.9922 5 ¾ 11
L ½ 51.5907 6 –
M 52.1892 6 ¼ 12
M ½ 52.7877 6 ½ 13
N 53.4660 6 ¾ –
N ½ 54.1044 7 14
O 54.7428 7 15
O ½ 55.3812 7 ¼ –
P 56.0196 7 ½ 16
P ½ 56.6580 7 ¾ –
Q 57.2964 8 17
Q ½ 57.9348 8 ¼ 18
R 58.5732 8 ½ –
R ½ 59.2116 8 ¾ 19
S 59.8500 9 20
S ½ 60.4884 9 ¼ –
T 61.1268 9 ½ 21
T ½ 61.7652 9 ¾ 22
U 62.4026 10 –
U ½ 63.0420 10 ¼ 23
V 63.6804 10 ½ 24
V ½ 64.3188 10 ¾ –
W 64.8774 11 25
W ½ 65.4759 11 ¼ –
X 66.0744 11 ½ 26
X ½ 66.6729 11 ¾ –
Y 67.2714 12 –
Y ½ 67.8699 12 ¼ –
Z 68.4684 12 ½ –