NWOT Men's button down gray shirt Lg runs smaller

NWOT This is a men's size large, runs smaller, smart gray plaid button-down shirt with one breast pocket. My husband loves this material as it's lightweight, and he does not get hot in them. However this brand runs a little small and a large which normally fits him was too snug. I cannot return because I cut the tags off and washed once in perfume free-color free detergent. Pet friendly, smoke free home. No trades