This is an amazing playsuit/swimsuit from the 1950s by Jantzen. Fabric is nylon.
Measures - Please make sure you double-check your own measures and compare them to the ones below.
Shoulder to shoulder: -
Armpit to armpit: 15" unstretched to 20" stretched (38cm unstreched to 50cm stretched) - flat
Waist: 27" (68cm) - flat
Hips: 39" (100cm) flat
Length: 31" (80cm) - counting from the top of the strap.
Fabric: Nylon
Condition: With signs of use but no problems at all. The zipper is not the original.