Los Angeles woman Mikel Ruffinelli lays (and assumedly sits) claim to the biggest butt in the world, [5] a badunkadunk-worthy 8.25 feet around. A svelte 5′ 4″ and 420 lbs, the 39-year-old appears in a documentary called World’s Biggest Hips that one would imagine was filmed with a wide-angle camera. A happily married mother of four, Mikel.