According to Jiahe Youju's inquiry, 58×84cm pillowcases should be used for 48×74cm pillowcases. The pillowcase is usually slightly larger than the pillow core, which is easy to clean and replace. The size of the pillowcase should be increased by about 5- 10cm according to the size of the pillow core, so that it can better fit the pillow core and ensure that the pillow will not shake or slide during use.

Pillow core is an important part of pillow. In ancient times, pillows were made of pillow core and pillow towel. Pillow cores and pillowcases are widely used now.