Approximately 18 inches by 18 inches measured from corner of pillow. 100 Polyester Fabric pillow Sham with pillow form. This pillow is made from Caroline's Treasures 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.Model NO BB3622PW1818"Caroline's Treasures BB3622PW1818 Red Border Collie Checkerboard Pink Decorative Pillow 18"" x 18"" Multicolor"Brand Caroline's Treasures