Guidelines for choosing suitable inner core in the industry: we recommend that you purchase a larger size than the inner size of your pillowcase (the inner size is the size of the part where your pillowcase actually contains the pillow core, and the size of lace should be removed with lace). 3cm-5cm the inner core will be full and durable.

For example, if the inner longitude size of your pillowcase is 35*35cm, use 40*40cm pillow core, which will be full and pressure-resistant. And so on.