You could also check your local hardware store for small strips of foam padding material as an option.Another simple solution to downsizing a hat that fits a little too big is elastic. Distributors selling hats or hat-making supplies typically sell this type of tape.Wipe along the underside of the sweatband using a damp cloth to remove any sweat or dirt residue.  |  Dry the ribbon by placing it near a radiator or leaving it overnight.Add a second grosgrain ribbon on top of the ribbon already in the hat if you want a sleeker look. According to HowtoCleanStuff.net, if your straw hat loses its shape, "try holding it over steam (i.e. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b4\/Shrink-a-Hat-Step-1.jpg\/v4-460px-Shrink-a-Hat-Step-1.jpg","bigUrl":"\/images\/thumb\/b\/b4\/Shrink-a-Hat-Step-1.jpg\/aid10621176-v4-728px-Shrink-a-Hat-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"