Alice + Olivia Thick Black Jacket/Blazer

Bought from another posher but doesn't fit. Thick/heavy Alice + Olivia black jacket, that resembles a blazer. Feels like wool. Size small but fits larger -- I'd say definitely more of a medium or even large (thus the sizing I indicated). For reference, I'm a size 4 and it swallowed me. Single snap button closure. Hand pockets. Bust 20” length 23”