What is the size of the Chiroflow® Professional Waterbase® pillow? August 06, 2019 14:49 The Chiroflow® pillow is a "Jumbo" size - it is 20" x 28" and will fit a standard or queen pillow case. Related articles Is my pillow hypoallergenic? How long can the water stay in my pillow before it needs to be changed? Chiroflow's Product Quality Assurance: Which side of the pillow do I sleep on? How do I fill my pillow?