Kenner Bionic Woman - 2 Sizes
Two different sized Bionic Woman dolls were released by Kenner in the 1970s. One with a larger head and longer torso and another with a smaller head and torso. The smaller doll body also has knees that move farther forward than the large size - they look unnatural when bent too far forward as well.
It's hard to tell in the photo, but the smaller doll on the left has a bulging neck where it connects to the peg on the torso.
Some of the Bionic outfits are a tad too big when put on the smaller doll. Some - but not all - of the smaller heads have a ton of hair. Much more than on the taller dolls.