A size 12 back then was roughly 34-24-34, and that's about what a size 12 bridal gown is today, as well as what a clothing pattern size 12 still is. A  1980s catalog size 6 is equivalent to a 1950s size 12 , but thanks to vanity sizing, today's size 6 is a 1980s size 12, and a 1950s 12 is probably smaller than today's size 0 . The uglies are delusional ; you can just look at pictures of MM and see she was slender. She had a long torso/short legs, and a funnel-shaped rib cage, which gave her a 22" waist at her slimmest. Their belief that today's size 12 makes them the same size as MM is proof that being overweight affects the brain cells. They be dumb!