yescustomdropship Alpaca Funny Custom Pillow Cases Covers Standard Size Pillowcase 20"x30" (Twin Sides) 1 Piece, Not include the pillow core. Standard pillowcase is roomy in size (20'' x 30''). Twin sides, The Front side is the same to the back side. Material:50% cotton, 50% polyester. It's a zippered pillow case, with a zippered opening on the side.