Aw I missed one round. I wanted to use Elena but now I replace her with something else. 2 of the pics below are from the same card.

EDIT: These are the original sizes from the card list. You can enlarge it if you want. Part of the difficulty is finding those insignificant details on the cards. In fact, some of these aren't even boobs.

EDIT 2: It seems too quiet. I can pm a volunteer the cards and have them choose a clearer picture or something. Though one of them is a buncle...
EDIT 3: Err, simple numbering? And I'm pretty sure 8 and 14 are the easiest.
Row 1: 1 ,
② , 3 , 4
Row 2:
⑤,
⑥,
⑦ , 8
Row 3:
⑨, 10,
①①,12
Row 4:13,
①④,15,
①⑥EDIT 4: I'm gonna circle the correctly guessed ones and color them. Remember that the picture is exactly the same size and inclination.
First people who got them:
CainHyde,
GOSCAR,
Malathrax