Throw Pillow Cover Size Guide - Cover Zone. Throw pillows come in all different shapes and sizes. 16 x 36 18 square pillow.
20x20 cover 22x22 insert. The exceptions to this rule. 16x16 cover 17x17 insert.
18x18 cover 20x20 insert.
Place a 20-inch square and a 22-inch square at each end with the shorter pillow. When buying or making a throw pillow cover the first thing you need to know is what size your pillow or cover is. 22-24 inch pillow at the back layer a smaller pillow 20-22 inches in the front. 14x14 cover 15x15 insert.
