Head size

005 (left) and 010 (right).
The size of the facial features and the head itself are getting smaller. The face of newer Pinkys are shrinking. Are they trying to save plastic? 005 and 001 (maybe 003 too) have the biggest heads and eyes. My all-time favorite is 004. The proportion is just right. It's the only droopy round-eyed Pinky. Well, 012 and 016 also fit into that category, but the smiley face makes it hard to customize.