Apparently, they don't like traps that use breast pads to obtain 'breasts' larger than around half of the cast.
On another note, could someone put notes over the characters and write their names? I know it would surely help me, and other people who only know Idolm@ster minimally, to know who is who. *Only knows Miki*
Some of these appear to be inaccurate or have been retconned.
Miki is actually 86cm. Hibiki is 83cm. Since the change came when she joined 765, fanon says Kuroi was lying about her sizes. Yukiho gets a small boost, she's actually 81cm. The twins are 78cm, but they're still growing, and this picture is fairly old. Iori isn't going anywhere though. Makoto is 75cm and Yayoi is 74cm, Yayoi is probably in the same situation as the twins. Chihaya remains alone at 72cm, but the gap between her and them has widened.
Don't ask me about the 876 idols, couldn't tell ya. Nor can I tell you why I bothered writing this up in the first place.