As a rule, the space between a chair’s seat & the tabletop should be between 6" and 10". For example, if you have a class of second graders, you might order both 13 ½" and 15 ½" chairs to seat a wide range of students. Both would fit a 19"-25" table height.
12-24 Months
Chair Height: 6" to 7 ½"
Table Height: 12" to 16"
Age 2
Chair Height: 7 ½" to 10"
Table Height: 15" to 20"
Age 3
Chair Height: 9 ½" to 11 ½"
Table Height: 16" to 21"
Age 4
Chair Height: 11 ½" to 13 ½"
Table Height: 18" to 23"
Kindergarten-Grade 1
Chair Height: 12" to 13 ½"
Table Height: 19" to 23"
Grades 2-3
Chair Height: 13 ½" to 15 ½"
Table Height: 19" to 25"
Grades 4 & Up
Chair Height: 15 ½" to 18"
Table Height: 21" to 30"