A standard bed pillow measures 20 inches by 26 inches. A twin-size bed fits one standard pillow across, full and queen-size beds fit two standard pillows across, and a king-size bed fits three standard pillows across.
Other pillow sizes include queen, king, euro and body pillows. Queen pillows measure 20 inches by 30 inches and fit exactly two across a queen-size bed. King pillows measure 20 inches by 36 inches and fit exactly two across a king-size bed. Euro pillows are 26 inches square and are typically quilted and filled with a down blend. These pillows are used for sitting upright in bed or for decoration. Body pillows are also called pregnancy pillows and measure 17 inches by 45 inches.