Selected Homme men’s check button down shirt

Excellent condition, super soft. Regular fit. ***I am a bit confused about their sizing, so please check flat measurements below to ensure the best fit. I bought for my hubs, who is a size large. 🧐 48% cotton, 52% viscose Approximate flat measurements: Pit-pit: approx 25” Shoulder-hem: approx 30” Sleeve length: approx 27” Across shoulders: approx 20”