Just a quick note about cup sizing, they work on a volume percentage, not exact volume. That percentage is typically 12% - 12,5% depending on manufacturer and sizing standard they use. Difference of 1-3 sizes between manufacturers aren't unheard of.

For example, I've outgrown my 90KK Ewa Michalak which corresponds closest to British 38LL, however a British 36KK Bravissimo bra now fits perfectly, their bras often seem to come with massively deep cups which explains why three sizes smaller by marked size is infact bigger than 90KK/38LL.

The 150cc-200cc jump between sizes is quite about true in average size range, but closing to higher end and especially in abnormally large sizes, the difference jumps way up, of course this isn't a problem to about 98% of all people who wear bras.