Gorgeous mid length vintage 90s slip dress by Betsey Johnson. Burgundy velvet with gold tone/rainbow flash sequins. Made in USA.

Size tag has been removed. I would guess it is a size Medium. but refer to measurements (taken laid flat):
Bust: 14.5 inches
Waist: 14 inches
Hip: 15.5 inches
flare: 19 inches
Length strap to hem: 39 inches