Approximately 18 inches by 18 inches measured from corner of pillow.  100% Polyester Fabric pillow Sham with pillow form. This pillow is made from this manufacturer's new canvas type material and can be used indoors or outdoors. This is a coated canvas with a heavy hand.  Mildew resistant, stain resistant, fade resistant and Machine washable. Made in the USA! These are all handmade and may vary slightly in size.