Throw pillows aren't all one standard size. They come in different sizes.
56x64
Queen Pillow: 20" x 30"
Do you mean a throw pillow? It's a small pillow usually found on the sofa or floor used for either decoration or comfort.
20X26 It is called a standard pillow case
The size of a standard pillow is 20" X 26". The size of a king size pillow is 20" X 28.
21"x 32"
Generally, twin size pillow cases are 22" x 33".
20" x 36" x 2"
make him throw up and then eat
Patterns for throw pillow covers can be found online from many different providers. Some examples of these providers include Overstock, World Market, and Etsy.
Something like 9 inches x 18 inches...
You'll need to wash it.
standard pillowcases are 21x32 while king size are 21x42