The Adult Fred Flintstones Costume is a yabba-dabba-doo fun Halloween costume! Meet the Flintstones this Halloween when you become one yourself! Our Fred Flintstones costume will make you the ruler of your own domain. This adult Fred Flintstones costume includes tunic and tie. See Size Chart Availability: This Adult Fred Flintstones Costume takes approximately 1 business day to leave the warehouse plus transit time.