Here's what we can say:
* The era: The 1950s and 60s were a time when girdles were widely popular, and actresses often wore them to enhance their appearance.
* Mansfield's image: Jayne Mansfield was known for her curvaceous figure and glamorous image. She certainly presented herself as a woman who valued her appearance and took care of her body.
* No documented evidence: There are no documented reports or photos of Jayne Mansfield wearing a girdle.
It's possible that she did wear a girdle, but it's also possible she didn't. Her body type and the fashion trends of the time made her appearance glamorous without the need for a girdle. Ultimately, we can only speculate.