Plaid Christmas vest

This vest would be perfect for a Christmas themed party or event!! I'd say that it runs small. Instead of an extra large it should be a medium. I am a girl, 5'7, and about 150 pounds. It is a little big on me but does fit. This would probably a guy a little bigger than me. It is too small for my brother who is 6'0 and 200 pounds. Pants and ornaments not included.