http://www.ebay.com/itm/281692389610
This vintage bathing suit was made in the 1940s. It is made of blue wool with a drawstring waistband, considered sleeker and sportier at the time than the belted models. It still has the original size tag and care tags attached to the suit.

Waist (unstretched) – 12″ (doubled = 24″)
Waist (stretched) – 18″ (doubled = 36″)
Side Seam – 10-1/2″
Rise – 15″