Sparkle-y devil! Vintage red sequin 60s go go dress

As I was taking measurements, it occurred to me that it's the same width everywhere: 18 inches across the chest, the waist, the hem... there was a style, a cut, but the term escapes me. 60s vibe. worn once for a show, I don't care For the way it fits me so passing it along. because it's vintage, it's OLD and not in perfect condition meaning there may be missing sequins or faded sequins but overall, it's in pretty great shape. hidden zipper under left arm. Listing it as a size 6 because I'm a 4 and it's a bit large on me on me.