Wherever you wear this Betty Rubble costume on Halloween, you will be a instant hit. Barney Rubble had himself one Paleolithic era babe of a wife! Grab your best friends and dress up as Betty and Barney Rubble and Fred and Wilma Flintstone for a fun group costume idea. Betty Rubble costumes are also perfect for handing Halloween candy to trick-or-treaters! © Warner Bros. Polyester.