A Dozen Propeller Beanies - Set Of 12 Color Assorted Propeller Hats Adult size hat, measures 7 inches wide x 3 inches tall. Complete your look with this funny hat. This beanie has a foil propeller and a elastic chin strap. Kid at Heart! With a propeller beanie like this you can remember the good old days. The perfect addition to any Tweedledee or Tweedledum Halloween costume, or an anytime fun hat!