Add our cheap, easy foam hat sizing to any of our costume hats to customize the fit or adjust the size to fit kids, teens, or adults with smaller heads. One 20-inch strip of our 1/4-inch-thick self-adhesive foam affixes to the inside brim of any of our hats to adjust the size down or prevent slippage in targeted areas. Just trim with scissors down to the size you need, peel off the paper backing, and stick the foam inside the hat brim! Note: May come in two strips totaling 20 inches.