Our birch line is made from a blend of organic cotton and linen. Shams have a two inch flange. Matches our birch duvet covers. Pillow shams are available in Standard (20″ x 26″), King (20″ x 36″) and Euro (26″ x 26″) sizes. All are envelope style cases with openings at the back with a six inch overlap. Shams come in a package of one.