I went for the 2X which is a 20/22 but it was a little too big for me in the top. With elastic panels to each side, the dress allows for extra booby room, something I lack! The dress is made from a thick, smooth cotton and hung beautifully with and without a petticoat. It's nipped in at the waist, which sat in just the right place before flaring out in to a lovely full style skirt. It also has pockets, which is a rare feature but one I absolutely love.