Not traditional sizing. Please see the size chart. Stripped Universal Standaer Popover Stretch Poplin Shirt Classic Fit. This is the button-down that started it all: Our iconic Elbe Shirt. Now in many variations, this version boasts a classic fit and is popover style with a half-placket that buttons to the center chest. Made from cotton poplin with our signature invisible stretch, it's engineered for maximum freedom of movement. No awkward gaping. No button popping.