Ruby Rox formal homecoming prom dress size 11

BRAND NEW , never worn Ruby Rox formal homecoming prom dress Formal dress for prom, homecoming, night out, wedding. Fits all formal occasions Sequin top with (I think) Silk bottom dress with a teal silk bell to tighten I had tags but the tags ripped. It has never been worn. Size 11-i’m not sure if the size is small, medium or large but I’m a size small and it’s a tiny bit big on me, so I think I’ll consider it a small/medium If you have any questions feel free to message me