DKNY black dress, size 6

DKNY black fitted dress, size 6 v-neck, stitching to enhance curves, hidden zipper on back, short sleeved, measurements approx pit to pit 18, waist 14.5, length 40.5 I bought this dress with every intention of wearing and now it is too small. tags are still attached. it has been hanging in my closet in excellent condition This dress is very flattering, it stretches but also sucks you in.