SUPER COMFY AND SEXY DRESS STRETCHY BEIGE & BLACK SZ. LG. MANNEQUIN IS SMALL?

THIS IS NOT NEW, IT IS Gently Worn AND IN GREAT CONDITION. I TOSS BAD CLOTHES AWAY. THE MATERIAL IS LIKE BUTTER. IT IS A MAXI DRESS BUT IT ALSO HAS A SKIRT INSIDE AS A COVER UP FROM YOUR FLOWY DRESS. I SEE WEARING IT AROUND THE HOUSE . IT READS A SIZE LARGE, BUT MY MANNEQUIN IS NOT A LARGE AT ALL. IT WILL PROBABLY STRETCH OUT TO A LARGE THOUGH. THE BACK IS SO SEXY. IT HAS WRINKLES IN IT, BUT I WILL WASH AND DRY IT BEFORE SENDING IT. ITS NOT DIRTY BUT IT WILL HELP THE WRINKLES. UNLESS ITS SUPPOSE TO WRINKLE? LOL