The Chair Should Be Adjustable
Seat height, backrest angle and, ideally, armrest height should all be adjustable. A student chair that only comes in one fixed height rarely suits everyone using it, particularly in shared households where more than one person might use the same desk. Adjustable features allow the chair to be fine-tuned to individual height and desk pairing, rather than forcing posture to adapt to the furniture.
Back Support and Lumbar Support
A chair without proper back support puts pressure on the lower spine during long sitting sessions, which is precisely when support matters most. Look for a chair with built-in lumbar support, or one where the backrest curves to follow the natural shape of the lower back. This single feature does more to prevent slouching than almost anything else in a study setup.
An office chair with a breathable mesh back also helps during longer sessions, particularly in warmer months, since it reduces heat build-up compared to fully upholstered designs.
Seat Depth and Comfort
Seat depth, the distance from the front edge of the seat to the backrest, should leave a small gap (roughly two to three fingers' width) behind the knees when seated with the back against the chair. A seat that's too deep forces either slouching or sitting away from the backrest entirely, both of which undermine the support the chair is meant to provide.
Padding matters too. A firmer cushion tends to hold its shape better over months of daily use than a softer one, which can compress and lose support within a single academic year.