what size are standard pillow covers?
<answer> The size of a standard pillow cover is 20 by 26 inches. <context> Quick Answer. A standard pillow is 20 x 26 inches, and a pillowcase is at least 4 inches longer than the length of the pillow and 1 to 2 inches wider. This brings the standard pillowcase size to 21 x 30 or 22 x 30 inches.