Beautiful VINTAGE pale blue sheer robe peignoir

Has a tag but I cannot read it. I’d guess it to be a M/L size. I tried it on with a T-shirt on (my bust is 36DD) and it had a bit of room, wasn’t tight. Measures 19” across along piping where the 2 buttons are. 16” from armpit to cuff. 46” from armpit to hem. There is a tiny hole on the back shoulder (see 2nd photo). Additional measurements available upon request!