Retrofete emerald Billie midi dress size small NWT

Retrofete emerald Billie midi dress size small NWT Brand new, never worn, with tags Literally just got it in the mail and tried it on and it’s too big :( bought it on a sale so I can’t return it. Green is a true emerald color Side zipper. Fully lined. Gorgeous beading. Straps actually have a little extra length on the inside so if you need to let them out for any reason there’s like an extra inch and a half of slack that a seamstress could alter. Model is 5’11 and wearing a small (same size as this listing). For reference I’m 125, 5’7, 34c, 34-27-36 and I’m between XS and S, it technically fits but turns out there’s a little give to the dress which I wasn’t expecting (I thought because of the beeding it would be very rigid and I was worried my hips wouldn’t fit the XS) and I want it tighter so I need the XS