Large Flannel - Blue Red Yellow - L fits M

This is a brand I had never heard of - 'Natural', which was in a Cabellas. It is a super soft and warm flannel with primarily blue, red, and yellow patterned checks. I have only worn this twice and it is in perfect condition. While I think it would fit a size large, I was styling it as an oversized flannel for which I would recommend size medium. The buttons going down are a brown tortoise-esc style and there are two pockets on the front of the shirt.