Vintage 1970’s Joy Stevens One-Shouldered Disco Dress Jewel Tones No Tag Medium?

Such a fun dress!!! Super-colorful. The size tag is completely faded, but I think it’s a small or medium. Laid flat, approximate measurements are: 15” across at the armpits 13” across at the waist 57” from top of shoulder to bottom of dress 25” from neckline to edge of sleeve *The edge of sleeve and bottom of dress need to be re-hemmed/sewn.