Long sleeve black fitted mesh pullover - XL but fits like a large

This is brand new, by reitmans and only worn once. It is mesh style, and very fitted. It says XL but I found it to fit more like a large. It's fitted as well. Measurements (approximate) : pit to pit : 17 inches sleeve length: 24 inches This item comes from a smoke free home, however I have two cats. I keep them away from the room I store my items, though.