erin i have a brand new one but it's a 16, i ended up with 2 of them somehow. let me know if it might work for you, my dress is a 14 but the underskirt for some reason is so much smaller than the dress. they run pretty small, like the dresses, have you tried one on? it's from DB, and i paid $50 but you can make an offer.
it's a biy poofy-er than ann's.
I'm a street size 13, 5'2", 165 lbs. and it fits perfect.