Quick and easy shark fin dog costume is held on by two elastic bands. Rubies costume company has been bringing costumes and accessories to the world since 1951. As the worlds costume leader we take seriously the mission to make dressing up fun! mascots rental quality costumes masks wigs accessories shoes and every significant licensed costume you would ever want to wear can be found under the rubies brand. Rubies brings you fun for every season: Halloween Christmas Mardi Gras Easter and all in-between.