The size standard of pillowcase varies according to the type of pillow. Common pillowcase sizes are: single pillowcase is 74 cm long and 47 cm wide; Couple pillowcase length 1200 cm, width 47cm；; Common sizes of children's pillowcases are 300*460mm, 300*500mm, 380*580mm and 250*400mm. The standard size of the pillow core is 45*75 cm, and then according to the height of the pillow core, the size of the pillowcase is generally length and width 10 cm. The standard size of pillowcase is 40 cm *65 cm in the cell cavity and 50*75 cm outside.