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? How long can the water stay in my pillow before it needs to be changed? Is my pillow hypoallergenic? Which side of the pillow do I sleep on? Can the pillow be washed?