So pretty!!   Vintage NEW OLD STOCK Gaymode (JC Penney) nightgown in a acetate/nylon blend that is sort of like a lightweight fleece or flannel.  Pink in color with cute embroidered flowers on the bodice.    Size on the tag is Size XL but please check the measurements carefully.   All measurements have been taken with the garment laying flat, so may need to be doubled.  

Underarm to underarm - 22.5"

Shoulder to bottom hem - 36"