Hi
Chantelle ... nothing is straightforward simple in Boobland, except for those women who are not abundantly endowed.
The cup size charts universally start at
AA, followed by
A,
B,
C, and
D.
Cup size is relative to the underbust measurement, or what you might call a woman's Back size ... so, in physical cup volume, a bra size
10D is equivalent to a
12C and a
14B.
As for any cup measurement beyond a
D, most countries acknowledge the
DD, except for the French and some US brands which skip straight over to
E ... this situation throws out the other manufacturers whereby a French
F is then equivalent to an AU/UK
E cup.
The Americans then play it out differently, by moving from
DD/E to
DDD/F and then
DDDD/G, then followed by
H,
I ,
J,
K, etc.
Aussie manufacturers, being a practical bunch, carry on from
DD to
E,
F,
G,
H, etc ... and so, an AU
G cup being equivalent to a US
H cup.
But then, the British have to do things their way and juggle from a
DD cup to
E, then
F, and confuse things by applying a
FF, followed by
G, followed by
GG, followed by
H, etc. Why the British do this is not reasonably explained, as is their lack of an
EE cup a mystery when all other letters - beyond the fourth letter of the alphabet - have a double increment in UK measurements. And so, a UK
GG cup is equivalent to an AU
I cup, which is equivalent to a US
K cup.
So, as you might surmise, big boobs are fun for play, but not so easy to 'fit' ...