Maybe in 1950 she was a 10. Clothing started at size 8 then. The dress from the 7 year itch sold at auction for 5.5 million. It had a 34 inch bust and 22 inch waist. It couldn't fit on a size 2 mannequin so they shaved one down and they still couldn't zip it up. She was no where near a size 10 today, which according to this chart is a 31inch waist. Vanity sizing is a sad reality of our ever expanding waistlines.  https://img.washingtonpost.com/wp-apps/imrs.php?src=https://img.washingtonpost.com/blogs/wonkblog/files/2015/08/sizes.png&w=1484