http://www.ebay.com/itm/271226477753
These vintage swim trunks were made in the postwar period, probably in the early 1950s. They are made of a knit blue rayon material, with a lined front and a drawstring waist.

Waist (unstretched): 12″ (doubled = 24″)
Waist (stretched): 15″ (doubled = 30″)
Side Seam: 8″
Inseam: 12″