Super soft mid weight 50% cotton / 50% linen plain weave fabric. Washed for additional softness. Classic blue/white small size check. Mother of pearl 4 hole buttons throughout. Classic Gilded Age fit. 43" chest, 41 1/2" waist, 30" center back length, 16" neck opening on size M. Contrast white poplin on inside yoke, collar stand, inside cuffs and placket.