Gnome Hats Set. Give your gnome a new look for Each season! Your garden gnome will be the best-dressed gnome on the block with this set of interchangeable hats. Simply change out his hat as the seasons change for four fun looks you'll love. The Gnome Hats Set includes a winter cap, umbrella hat, St. Patrick's Day Leprechaun hat and a straw hat. Four-piece set. Approximately 4"W.