This super cozy THEORY Riduro Organic Cotton Button-Down Shirt features gorgeous breathable fabric to keep you confident and comfy all day. Tagged size L but here are the measurements laying flat: 20.5” underarm to underarm 26” long From the brand: Soft organic cotton shapes this classic fitted button-front shirt with menswear-inspired finishes. Spread collar Long sleeves Button cuffs Button placket Shirttail hem Back yoke Dry clean Made in Peru Fabric content & care tag missing. First 4 images are stock, provided to show style and fit. In good preowned condition. Light signs of wear throughout. No stains or holes. No missing buttons. Thank you for checking us out.