Ohhh scary....

from biggest to smallest:
Neomi: E cup, definitely. She's very insecure about it, but heinrich makes her feel better (somehow...?)

Reggie: C up, on the heavier side, nearly a D.... binds but doesn't do it well.

Faline: C cup. Medium sized yet noticeable... her blouses/bras make her seem smaller. Fun fact! she also has inverted nipples!

Marble: A cup, but has a little there. Doesn't mind it.

Effie: AAAA cup. completely flat like a board.