The size of a standard pillow is 20" X 26". The size of a king size pillow is 20" X 28.
What is the biggest size, that a pillow pet you can get
26 x 26 is the US version of a Euro pillow. Euro pillows are larger, probably 28 or 30" I have European bedding and cannot find any the correct size in the states.
The standard size of a pillow case is 21"x30".
A housewife pillowcase is a standard size pillow case that is open on one end but with a little flap inside that you can tuck over the end of the pillow so it a) doesn't show the white of the pillow inside and b) your pillow stays put. From my experience they are much more common in Europe (but NOT the same as a European pillowcase).
king size
The pillow
Generally, twin size pillow cases are 22" x 33".
Any size you want it to be.
12 inches
The average size of a king size pillow is 20" x 36"
Standard Pillow SizesStandard Pillow -- 20" x 26"Queen Pillow -- 20" x 30"King Pillow -- 20" x 36"European or Continental Pillow --26" x 26"Boudoir Pillow -- 12" x 16"