Feels soft and floppy if you put 20"sq. insert inside 20"sq. pillow cover. Feels much more firm and looks puffed out if you put 20"sq. insert into 18"sq. covers. So I ordered 2 more 20's for 18" covers; and an 18" insert for a 16" pillow cover; and, 22"sq. inserts for the 20"sq. Westerville Natural Fibre Cotton Throw Pillow covers to make them feel firm and look puffed out. Here's hoping. Could've been told ahead of first order.