Chinese Laundry LBD Shelli Segal Dress

This gorgeous little black dress is classic elegance. Below is the link from Nordstrom with reviews. I marked this listing a size 4 but the tag says 8. I'm a size 4 and it fits me perfectly. This dress runs very small (see the review from Nordstrom) http://m.shop.nordstrom.com/s/laundry-by-shelli-segal-spaghetti-strap-ruched-jersey-dress/3894531?origin=category