We always called these housecoats but I know there are many names for them.

One front pocket
Poly/cotton blend is lightweight and semi-sheer
Has 3 small spots, all at the same level from having a little paper pinned to it when it was folded (see photos)
Was line dried, so it may need steaming

Please check measurements and compare to a gown you already own. 
        

• about 25" underarm to underarm
• about 38.5" length from shoulder to bottom hem 

 Smoke free home