The height of a kids chair depends on the type and purpose of the chair. | 2. Kids rocking chairs & kids study chairs should be such that your kid can easily sit on them and get out of them without getting hurt. Generally, it is 10-12 inches off the ground. | 3. The chair should be of enough height (considerably between 32-35 inches) so that you can make your kid sit with your family at the dining table.