What is the size of the Chiroflow Professional Waterbase pillow? August 06, 2019 14:40 Updated The Chiroflow® pillow is a “Jumbo” size – it is 20″ x 28″ and will fit a standard or queen pillow case. Related articles What type of polyester filling is used in the Chiroflow pillow? Is Chiroflow hypoallergenic? Can the pillow be washed? How much water should be used? Is normal tap water okay to use in the pillow?