For higher desks and work surfaces, go for this HOMCOM draughtsman chair. Set the seat between 53-78 cm - it's easy to set it to the position you want, so you work at the level which doesn't strain you. The lumbar support moves forwards/backwards and up/down. The seat is padded with high-density foam for comfort which always retains its shape. Complete with flip-up armrests and bottom metal bar to rest your legs and feet.