Planting Series - Fresh Small Mushrooms Custom Pillow Case Rectangle Pillow Cases 16'' X 24''(two Side) (6) Pillow Case Custom Pillow Case 18"x18"(two Side) Size: One size fits all Material : 50% cotton, 50% polyester Minimum Order Quantity for 1 piece The material is made of a fine soft blend of fabrics, giving the pillow case a soft and comfortable texture.