Vintage Psychedelic Floral nightgown Renaissance brand

Gorgeous vintage 60’s-70’s house dress, nightgown, robe. Bright yellow orange purple with gold flower buttons in the front and zipper in the back. In excellent condition. One sleeve needs to be re-stitched on the inside hem. Size 17 1/2 across 51 inches long. I would say this is a size medium. 80% Arnel triacetate 20% nylon