Sandro Aney Dress Petrole Blue Teal Size 38

Sandro Aney Dress Petrole Blue Teal Size 38, runs small, for reference I am an hourglass size 6, 135 pounds, would fit a size 4 or a less curvy size 6. Bought it for an event but it was too small for me. NWT, still in bag with hanger. Came without actual tags but with a code bar on the bag as shown.