Y2K Vintage Top Tag is gone but I would say it is M to possibly L On eBay the sizing for a L tagged shirt was slightly bigger so it’s probably originally tagged M but can fit L as it’s flowy and has a stretchy waist band Found exact same shirt on eBay with tag brand name Mushka by Sienna Rose Flowy Boho Fairy Butterly Sleeve Top Beaded and Sequin Embellished Neckline 2000’s, Hippie, Mcbling, Artsy, Grunge, Fairygrunge, Boho, Bohemian