A footrest that adjusts from 4" to 9" is what separates this study chair from an ordinary task chair: a child's feet stay supported instead of dangling, which keeps posture upright through homework. Armrests rotate 90 degrees and lift 1.8", the seat rises from 16" to 20.5" and the whole chair spans 31.5" to 36". PU and nylon over foam covers a 17.5" x 16" padded seat with a 16" x 12" ergonomic backrest. Rated to 330 lbs. Assembly required; net weight 17 lbs. Seat height and footrest height can be adjusted separately as the study desk or child changes. The rotating arms allow the chair to be positioned closer to a table edge when needed. A swivel seat helps the child turn from a notebook to a computer without pushing the chair across the floor. This gray variant has a padded seat and a curved backrest for a bedroom learning area. Seat size: 17.5" x 16"