POLO Ralph Lauren American Flag Wool Blend Sweater Shrunk

This says size M, it has MAJORLY shrunk. I’m an XS and I couldn’t get it over my head. It’s still a boxy enough fit but in shoulders arms and neckline it seems like you’d have to be pretty tiny, potentially a kid Underarm to underarm 15.5 in Underarm to end of sleeve 16 in Should are like 16.5 in across Length from highest point to bottom at longest21 in