http://www.ebay.com/itm/271465674232
This vintage one piece swimsuit was made in the 1960s, part of a short lived revival of 1920s mens swimsuit styles. It is a copy of a one piece 1920s style, with a blue top, striped bottom and a white belt. Unlike the originals, which were made of wool, this one is made of nylon. It was never sold or worn, and still has the original tags. It is tagged a size medium
Waist (unstretched): 14″ (doubled = 28″)
Waist (Stretched): 20″ (doubled = 40″)
Crotch to shoulder, unstretched: 26″
Inseam: 3″
Outseam (from seam between top and bottom): 10″
See also: https://vintagehaberdashers.com/2013/07/07/1960s-mens-one-piece-swimsuit/