http://www.ebay.com/itm/281124703951
This vintage wool bathing suit was made in the 1930s. It is vibrant blue, with loops for a belt. The only tag reads “Guaranteed 100% All Wool”.

Waist (unstretched): 14″ (doubled = 28″)
Waist (stretched): 18″ (doubled = 36″)
Side Seam: 8″
Rise: 12-1/2″