Vintage 70s maxi metallic dress with great print

Lovely vintage 70s maxi dress No tags of any kind. My estimate is that it is a size medium but please see measurements. Photographed on size 8 mannequin Elastic waist; add at least another 3-5" for the width of the waist 3/4 length sleeves Psychedelic print on a purple/brown background with a metallic sheen Most likely polyester In very good condition 2541