Ordinary classrooms are 8~9 meters long, 6~7 meters wide and 3.5 ~ 4 meters high (ordinary classrooms), and the height of classrooms or terraced classrooms has increased.

China's current national standard "Hygienic standard for school desks and chairs" GB 7792 stipulates that there are 10 types of desks and chairs used in primary and secondary schools, with a desktop size of 0.60 m× 0.40 m and a desktop height standard size of 0.76 m ~ 0.49 m The clearance under the desk, the height of the chair, the effective depth of the chair surface, the width of the chair and the height and width of the back of the chair are all stipulated accordingly.

Extended data:

The layout of desks and chairs in the classroom shall meet the following requirements:

1, the row spacing of tables and chairs in ordinary classrooms in primary and secondary schools should not be less than 0.90m, and it can be 0.85 m in independent incomplete primary schools;

2. The horizontal distance between the front edge of the front desk and the front blackboard should not be less than 2.20 m; The horizontal distance between the back edge of the last row of desks and the front blackboard shall meet the following requirements:

3, the primary school should not be greater than 8.00 m;

4, middle school should not be greater than 9.00 m;

5. A transverse evacuation walkway should be set behind the last row of seats in the classroom; The clear distance from the back edge of the last desk to the back wall or fixed furniture should not be less than1.10m;

6. The width of the longitudinal walkway of ordinary classrooms in primary and secondary schools should not be less than 0.60m, and it can be 0.55 m for independent incomplete primary schools;

7. The clear distance between the table end arranged along the wall and the wall surface or wall protrusions such as pilaster and pipeline should not be less than 0.15m; ;

8. The horizontal viewing angle between the front seat and the far end of the blackboard should not be less than 30.