Herman Miller Aeron vs Herman Miller Aeron Size B

Both are the same Aeron design; the real difference is size and back support. The Size A is built for smaller users, with a lower seat and a 136 kg limit, and it comes fully featured with lumbar height adjustment. The Size B fits average to larger users, carries up to 159 kg, and adds PostureFit SL for firmer lower-back support. Owners praise the Pellicle mesh for staying cool and the 12-year warranty; the common complaints are the hard seat edge and the fixed frame that suits some bodies better than others.

• Choose the Aeron Size A if you are shorter or lighter-framed and want the smaller seat pan and lower height range to fit you properly.
• Choose the Aeron Size B with PostureFit if you are average to larger build and want the extra weight capacity plus firmer sacral support.