Probably a theater or cinema costume, made by a costume designer in the second half of the 20th century (some internal seams are manual or made with a sewing machine, zipper on the back and under the left armpit to facilitate insertion, two press studs at the back of the collar, late elements).
Height: 1.65 - 1.70 m
(First three photos for front and side views / last 3 photos for the rear view)