1.Package: This kit has a cushion back with a zipper. 2.Size: 16in x 16in. 3.Material: Cotton. Soft and delicate, good texture, strong air permeability, good comfort. 4.Design: The back of a solid color pillowcase matches any pillow front design, so you don't have to worry about the wrong color or pattern. Meticulous workmanship, quality accessories to create a comfortable life. 5.Note:Our product is not a complete pillowcase, just a solid color pillowcase back. Our cushion back kits do not include the pillow inner core or the pillowcase front. You can choose the front of the pillowcase you like and sew it with this product, so that it is a complete pillowcase.