Aeron Chair’s Size and Customization

Aeron Chair’s Size and Customization

The Aeron Chairs sold in the Mass Order are all fully loaded.
Meaning they come with full features which includes the following:

    • Height Adjustment.
    • Recline Limiter.
    • Forward Tilt.
    • Tilt tension
    • Fully adjustable arms (Height, depth and angle)

The following options or upgrades might be available

  • Graphite colour frame or Polished Aluminium frame.
  • Posture fit SL or Lumbar pad back support.
  • Vinyl or leather arm pads (Leather is only for polished aluminium frame models).
  • Hard or standard hard castors.
  • Add on fully adjustable headrest from Engineered one(USA).

We do not order the basic models as they don’t have the ergonomic features.
The most commonly ordered upgrades are the hard castors and headrest addon.


The information below is for the Remastered Aerons only. The classic version may have slight differences.


Posturefit SL support

The posturefit SL has two pads that provide support to the sacrum and lumbar region, and its depth is can be adjusted to fit the curve of the spine.

Herman Miller Remastered Aeron Back

Posturefit SL


For the mass order, we only have the posturefit SL available for its preferred support.


Hard or BB Carpet Casters

Casters are the wheels of the chairs.

Standard BB casters are for carpet , they are very hard wheels with no additional coating.

Hard floor casters are with a softer polyurethane coating on the wheels which increase the amount of traction, to keep the chair from gliding away easily. The coating also reduces noises during rolling and reduce the chance of scratching hard floor.

The hard casters that we have are German-made from the same OEM factory as the original that are more durable and more stable in its quality. It can be used on carpet too. They come with rollaway resistance, a subtle braking system that keeps your chair from rolling too far away when not in use. They are also with the latest noiseless roll technology, which greatly reduces the amount of sound from vibration when rolling.

It is important for the user to keep the casters away from aggressive liquid detergent and keep the wheels from direct sunlight. The habit of stepping on the wheels may result in disintegration. Do note that hard casters breaking down within 5 years due to poor compatibility with the flooring, will be replaced with standard BB casters.


3rd party fully adjustable head rest from Engineered One(USA).

Many users requested for a headrest to lean back for taking naps, or simply to rest their head .

The Engineered Now Aeron Headrest is the missing piece that gives the Aeron chair the additional support, all the way to the neck
This is the most frequently requested upgrade.

They’re only a few makers for headrest in the market. A few trials had been made and the best headrest comes from the company call Engineered Now from the USA which has a fully adjustable design to fit all users.

Key advantages:

  • Patented design for full adjustment with better manoeuvrability. Height, Depth & Tilt Control
  • Angles can be tilted to any degrees.
  • Synchronized angling when the user tilts
  • Flexibility in extending to both height and depth.
  • Able to lock positions for most joints. (Many other makers have a problem with locking in the depth and getting out of position).
  • Mesh design – No entrapment of body heat causing discomfort.
  • Better flexibility on the mesh to facilitate contouring.

There are two versions.

  1. HR03
  2. HR04

HR04 is 20% larger and can be adjusted taller


HR03 for remastered Aerons


HR04 for remastered Aerons


We do have headrest for the classic Aerons as well.





Reviews: Customer Reviews: VendorGear Headrest for Herman Miller Aeron Chair

The main advantage of the engineered one headrest is the adjustability and its breathable material.
It empties every gap from your entire spine up to your neck developing the perfect support.

To support the head well, the right place to support is the neck. Else if the headrest pushes the head, it will lead to the forward head posture

As it’s adjustable, you can tune the right angle to fit the position of your neck, as well as how much support is necessary.

It fits so snugly until you can’t move much out from your correct posture.
We highly recommend this upgrade above all the other upgrades.

Another thing is the tension can be adjusted by tightening the screw.
Engineer now headrest 2

Engineer now headrest 3


Price of the headrest will be discounted it’s sold with a chair together. The HR03 and HR04 are designed for the Aeron chair and cannot fit the embody chair or other series


Here are the size charts.

Remastered Aeron


It will be more appropriate to get the right size base on the chart than testing.
In the event the given weight and height have two possible sizing, users are encouraged to read the chart and decide which size it’s closer to.
Do note that if the chair is too big, the user will lose the dexterity of tilting the chair. As the user do not have the weight and height to angulate and pivot the tilting mechanism.