I have a brand new Classic Fit Men's robe from Stafford in size L/XL. It is lightweight summer robe in a cotton/polyester woven fabric with two front pockets, long sleeves, and a self belt. The background to the print is actually dark navy blue, though it looks black in some photos. The print is an English Hunt print.  

Machine wash cold; tumble dry. 60% cotton 40% polyester

Measurements (All laid flat):

Center Back:(top of collar in back, to hem): 46.75 inches
Side Seam:32 inches