The Medium size Herman Miller Aeron Office Chair in Black is a high-quality and stylish office chair designed by the renowned brand Herman Miller. The Classic Aeron model offers comfortable support and durability for long hours of work. With its sleek black design, this office chair is perfect for any modern office setting. This chair works perfectly and is in excellent condition. I do have the armrest. They just need new pads, not pictured Additionally, the medium size ensures a comfortable fit for a wide range of users.