Aeron chair

The Aeron fits by size rather than by seat slider, and that is the thing to understand before buying. It comes in sizes A, B and C, with seat depths of 16, 17 and 18.5 inches, and Herman Miller says the range covers nearly everyone from the 1st to the 99th percentile. Pick the size that matches your thigh length; guess, and no setting will fix it. Its PostureFit SL back support adjusts, the fully adjustable arms are worth choosing over the fixed ones, and a new chair carries a 12-year, 3-shift warranty. Since June 2026, Herman Miller has also sold Aeron chairs it has restored itself, online in the United States and Canada, at a lower price and with a 5-year warranty. They are final sale, so settle the size first.