Diy Flintstone Costumes . Trace the outline using a shirt that fits about how you want the dress to fit. Sew the skirt pieces together with side sides together. Fred And Wilma Flintstone Costume DIY Flintstones Costume from www.thesitsgirls.com Inspiration, make up tutorials and all accessories you’ll need to create your own [page_title]. Use a 3/8″ seam allowance. Yabba dabba doo into the diy halloween season with this flintstone diy halloween costume that is just too cute to pass up on!