Hi i'm a 40 year old plus size lady. I need help to find a nice dress for my son's girlfriends deb. My son is her partner for the deb. I'm doing the special dance with my son. I have no idea what to wear that will make me look & feel slimmer. I'm a size 18 -20 Australian i'm about inches tall. I have no shape my stomach thighs & bum are my biggest problem. So please if you can help me find a nice dress that's just below knee length I would be very grateful. Kind Regards Nicole.