Dolls Kill Digital Inferno Reflective Bodysuit

Bought this at a sample sale and... Attempted to get it on but it's wayyyy too small. It's labeled as a large (the tag on the Bodysuit piece isn't really attached so maybe it's without tags? See photo) and definitely isn't; I'm normally a medium in stuff, maybe large, this i can't even get up my arm or onto my hips. Measurements flat: Biceps: 5" Bust piece: 15" (High) Hip piece: 16" Bottoms: 15", stretched: 17" (technically goes to 18")