Finding a last-minute dress in the right size can be tough, but PromHeadquarters.com makes it easy by gathering all of the in-stock, plus-size prom dresses in one convenient location. Our in-stock, plus-size prom dresses include gowns in sizes 20, 20w, 22, 22w, 26, 26w, and 28. We carry all of the latest styles, colors and designs, so whether you're looking for a trendy front-slit dress or a sequined gown, you'll find the perfect dress to celebrate your big night.