When designing our pillows, they were approved by a team of chiropractors. Our mini pillows measure 10 inches by 16 inches and are designed for children aged 2 to 5 years. Our large pillow is 20 inches by 16 inches. All our pillows come with a zipper, allowing you to adjust them by adding or removing hulls. This way, you can customize your pillow to match your favorite sleeping position or preference for a firmer or lighter pillow. It can also be adapted for children from 6 years old and up, to follow them as they grow up. Take out some of the buckwheat hulls, keep them in a jar and add put them back in the pillow as your child grows or based on their comfort.