This is a long black velvet evening gown by Malcolm Starr, from the 1980's. The gown has beading and rhinestones around the front and back neckline, empire waist, black lining, and a zipper up the back.
Measurements:
Size# 8
Length (Shoulder to Hem): 53 1/2"
Shoulder to shoulder: 14 1/4"
Sleeve: 21"
Bust: 32"
Waist: 29"
Hip: 36"