These pillows are perfectly fit for your pillow covers (18"x18") whether decorating a bed or rejuvenating a couch. Don't have to buy new pillow inserts every time you want to change your interior decor. Just change their different color covers. Whether you are using it solely as an accent piece to create interest in your room, or as a functional head pillow, this fashionable bedding accessory offers great looks and endless comfort.