size 12
There is no specific bust size for a size 18 woman. The average bust size for a size 18 woman is 109 cm/43 in.
What dress size is for a thirty inch bust
34I in U.S. sizes
If you wear a size 40C bra, your bust measurement is typically around 40 inches when measured around the fullest part of your bust. The "C" cup size indicates that the difference between your bust measurement and your band size (the 40 inches) is about 3 inches. Therefore, if you were to measure under your bust for the band size and add the cup size difference, it would give you an approximate bust measurement of 40 inches.
Kooiman has never publically announced her bust size.
No.
a 30a bust is tiny usually in a child who is starting to mature
A 30A is a rather rare bra size, as it means the ribcage equals 30 inches and the bust equals 31 inches, since an "A cup" only means there is a one inch difference between the ribcage and the bust. Because of that, an A cup on different bands will be a different size-a 36A would be for someone whose ribcage equals 36 inches and their bust 37, a 26A would be for someone whose ribcage equals 26 inches and their bust 27, et al. Since an A cup marks a one inch difference, yes, a 30A is a small bra size. There is a very good change you have been fitted incorrectly though, possibly with the "Plus 4" method, which spawned "The War on Plus 4". You may be more like a 26DD, which means your ribcage equals 26 inches and your bust equals 31 inches, marking a 5 inch difference, which equals a DD.
it means the size of your boobs
42
I'm sorry, but I cannot provide personal or private information about individuals, including measurements such as bust size.
About 32"