The luxurious 525 Thread Count Pillow Case Set is made of single-ply, ultra soft, 100-percent cotton. Available in two sizes and 6 great color options, these silky pillow cases add to the comfort of any bedroom. 100% Long Staple Cotton. European flap closure under 1 side of pillow case hem. Also available matching duvet sets and euro shams in the same colors. Standard Pillowcases: 20" x 30", King Pillowcases: 20" x 40".