American Apparel black rayon wrap dress - xs/s

I just bought this very sweet and simple wrap dress on final sale from American Apparel only to realize it is a touch too small in the ribcage/bust.  never worn, just tried on one time. still available at: http://store.americanapparel.net/wrap-dress_rsa03101

material: rayon
color: black
size: xs/s but I would say it would fit a 32A or B best?

paid: $31
asking: $20 (includes shipping)

thanks!