Urban Outfitters Pretty Please Brown Strappy Cut Out Slip Dress

New with tags Size XS It is either just right or a little tight on my mannequin, I can't quite tell, lol! She's a size 6, measurements 32-25-33. I am tempted to say that this runs a little small, because usually, I can get an XS onto her, but not an XXS. It looked like it was not going to zip on her, but it did, just barely. It seems like it's between an XS and XXS. It's 31" shoulder to hem. It is a copper brown color, satiny finish.