Sized for the years between six and fifteen, this chair climbs from 31.5" to 36" so the same seat serves a primary schooler and a teenager. Five sit-brake wheels lock under 55 lbs of load and roll freely when the child stands. Nylon mesh across a 17" x 15" backrest and seat keeps air moving, and the curved back with side armrests supports the spine, waist and arms. The base measures 22.5" across with wheels. Rated to 330 lbs; net weight 14.5 lbs. For homework at a fixed desk, the sit-brake casters hold position after the child sits down. When the seat is unoccupied, the chair can be rolled to another part of the room without carrying it. The adjustable height helps the same mesh chair work at more than one desk setting as the child grows. Gray is the selected variant in this row; the curved back and side arms remain the defining structure. Seat height: 17"-21.5"; Seat size: 17" x 15"