GordonLee Cool Keep Calm And Call Batman Cotton And Polyester Square Zippered Pillowcases Case Protector 18 by 18 Inch 1 Piece, 2 sides. Fashion and popular design Size 18"x 18", 50% Polyester and 50% Cotton Zippered pillowcase, with a zippered opening on the side Machine wash cold, warm. Do not bleach or tumble dry Package takes around 7-21 days to the USA for delivery