Beautiful Colorful Floral Patterned & Beaded Black Caftan - L?

This is a very beautiful caftan in a black background with floral patterns throughout. The neckline has many multi-colored beads. No tags. The material is very soft. I believe it's rayon. Has short sleeves and the hem is longer in the back. No size tag but this measures 21 inches pit to pit and is 33 inches long in the back from top to bottom. It looks to be a large. In mint condition. Looks like it's never been worn. Bought at an estate sale.