Question for someone who knows about Bra Sizes...?

I wouldn't describe her as "realistic" in any sense. She's a magic construct even within the story, basically, and beyond that her character design is that of a cartoon character.

And maybe slender is the wrong word... well, here. This is how I describe her, in different parts of the story:

"Further, Dorothy was matured in form, gifted with a large and shapely chest, desirable fixtures around the midriff, and well-defined legs, earning her the nickname [...]"

"It was quite a feat. Dorothy was not small by any standard, at a (relatively) formidable height of five nine-and-half, and weighing one hundred sixty-five pounds, that weight which wasn’t sculpting her distinctly hourglass figure being dense, although nearly undetectable muscle deep within her workings. She also possessed a strong center of balance, and superhuman strength. The apparent ease with which he had knocked her over was altogether surprising."