NWT Madewell Relaxed Button-Front Shirt in Poplin Eyelet White Size Medium Crafted of lightweight cotton poplin, this button-up shirt has a relaxed fit for a laidback vibe. Classic design details like a patch chest pocket, long sleeves and a shirttail hem make it a wardrobe essential. Armpit to Armpit: 21.5” Length: 26” Sleeve: 23.5