Sizing is huge! - Patagonia Lightweight Synchilla Snap-T Pullover - Mens

It's a great piece, Patagonia, rah, rah, rah. I have owned a couple of synchilla snap t's, but they are both many years old. I purchased this lightweight piece to replace one of those old synchilla's. The old pieces I have are size large and fit well. I purchased this piece in size large and holy moly it wears like a tent. It is freakin huge on me. Great swaths of fabric hanging off. They had no medium available so back it went. That's all I got......peace out.