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Availability:
12 left in stock
Arrives
Saturday, Jun 21
Features
- Fits Your Herman Miller Chair - Measuring 20.25 inch Width x 18 inch Depth x 6 inch Height, our Herman Miller Aeron replacement parts are designed to fit any Classic Aeron chair size B. Replace your old chair seat with great ease!
- Tough & Durable - Our Aeron Seat Replacement parts feature a reinforced, heavy-duty frame to ensure that it won't break, crack, or get damaged easily. Sit on your new cushion without worries!
- Sit Comfortably - This seat is made of filament which offers fantastic ventilation, so you can stay cool all day. Our seat's black mesh fabric also matches the mesh of Herman Miller Aeron chairs.
- Fuss-Free Installation - No need to call a handyman to put these chair seat replacements in place. This new Aeron chair seat comes with a manual that'll help you remove and replace your old seat.
- Ready To Use - With this new Replacement Seat, there's no need to assemble mesh, and foam required. The seat itself comes ready to install so you'll only need a few minutes to revamp your Herman Miller Classic Aeron desk chair.
Brand: FOAMON
Color: Graphite
Product Dimensions: 18"D x 20.25"W x 6"H
Size: SIZE B MEDIUM
Back Style: Solid Back
Brand: FOAMON
Color: Graphite
Product Dimensions: 18"D x 20.25"W x 6"H
Size: SIZE B MEDIUM
Back Style: Solid Back
Special Feature: Durable
Product Care Instructions: Wipe Clean
Unit Count: 1.0 Count
Recommended Uses For Product: Office
Maximum Weight Recommendation: 300 Pounds
Style: Classic
Pattern: Solid
Room Type: Office
Age Range (Description): Adult
Included Components: User Manual
Shape: Rectangular Prism
Arm Style: Armless
Surface Recommendation: Hard Floor
Furniture base movement: Swivel
Indoor/Outdoor Usage: Indoor
Furniture Finish: Graphite
Seat Depth: 18 inches
Fill Material: Foam
Leg Style: Pedestal
Reclining Position Count: 1
Is Customizable: No
Is Foldable: No
UPC: 860003555958 860003555965
Form Factor: Plastic
Manufacturer: FoamOn
Item Weight: 4.76 pounds
Country of Origin: China
Item model number: Aeron Size B
Date First Available: September 30, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jun 21
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This is a perfect fit for our Aeron chair that fell apart after more than 25 years of use. It seems to be as good quality wise as the original and was straight forward to install. Very comfortable with the same feel as the original.
Reviewed in the United States on February 2, 2025 by Milton C
When the seat of my 30+ year old Aeron chair failed, I started looking for replacement chairs, and then read a Consumer Report review of office chairs. It still had the Aeron chair listed as one of their top choices. This encouraged me to look to repair rather than replace the chair, and I came upon this replacement seat. After watching several YouTube videos, I started the replacement process. For the most part, the process went smoothly. Getting the seat and the swing arms detached was relatively easy. Getting the replacement seat and one of the swing arms reattached was also relatively easy. Getting the second swing arm reattached was a bit of a challenge. I own what may be a first-generation Aeron chair, and as shown in the instructions, there are bushings and a spacer that were replaced on more modern versions of the chair. Dealing with the bushings and the spacer on this second arm was a bit of a chore. Add in that I am in my 70s, and don't have a good work bench to work on. Some choice words were uttered while trying to get the hole, bushing, and screw into alignment on that final connection. That said, I dd get it back together, and it seems to function just as it did before the tearing. I do wonder whether over time there has been some distortion/warping of the seat that made reattaching the second swing arm more difficult. In the end, it was worth the effort. I will note that my seat frame was intact, and it was only after i ordered that i noticed one could buy just the mesh insert and replace it. If I live long enough to need to replace the mesh again, this might be the route I pursue. It reduces the cost to about half of what this product runs. For now I am happy to have my chair back.
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Reviewed in the United States on June 9, 2024 by A. M. Glaeser
Easy to install and perfect fit. Buy w confidence
Reviewed in the United States on January 25, 2025 by Andrea Zabkar
This is a third party replacement for the seat of an Aeron chair size-"B". It fits PERFECTLY for a size B. If you read someone complaining that it doesn't fit, it is because they ordered the wrong item OR the wrong item was shipped to them. But the item listed here, the one I have received fits a size B perfectly! NOTE: The amazon listing has clear images showing the dimensions of a size-B and size-C chair seat. It also has (and I found this to be the most useful) an image illustrating how the back of the chair has TWO screws for a size-C chair and ONLY ONE CENTERED screw for a size-B chair. I included a photo of my size-B chair for illustration. The good: - It fits perfectly and it's easy enough to replace. The Bad: - The product arrived with a torx screwdriver instead of a 4mm hex key. If you have a set of hex key at home, you're good. Otherwise get one here with a 4mm key. (Note: I only had an imperial set of hex keys and I found and used on that was close enough to hold securely) - The instructions are terrible (mostly ass covering with CAUTION boxes). But it's easy to install. Here are the simpler instructions: Removing the old seat: 1) Remove the large side screws holding the seat of the chair using the larger 6mm hex / Allen key 2) Remove the 2 sets of nuts/bolt forming the "collarbone" connector below the chair, using the provided 10 mm socket and the (or your) 4mm hex / Alen key Putting in the replacement seat: 1) Attach and screw in the 2 sets of nuts/bolt forming the "collarbone" connector below the chair, using the provided 10 mm socket and the 4mm hex / Alen key. ** IMPORTANT** do these ones first or (like me) you will have to redo it... if you put the larger screws in first, you won't be able to access the space to put in those smaller ones after. 2) Align the seat, insert and screw in the large side screws holding the seat of the chair using the larger 6mm hex / Allen key Conclusion: Bad instructions, wrong tools (but hey, they **included** tools, so it's not too bad!). Great seat, that fits perfectly! Verdict: If you have a size-B chair and need a new seat: GET IT herre!!
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Reviewed in the United States on January 6, 2023 by Christian Christian
I recently got a 2002 Aeron Classic size B locally from someone and the chair was in great shape, but the seat was sagging some. It was clear that just replacing the seat would probably be the best bet as it obviously takes the most beating. I was a little hesitant when ordering this because the price was good and the promise seemed big. It kept the promise and is great! It also comes in this insulated tote bag with all of the tools in their own zipper pocket and honestly, the bag itself is just a big bonus. Overall, I've had the seat for upwards of a week, sit in it daily for long periods of time and it feels great! It looks like the original, everything matches up well from a coloring perspective and the mesh looks the same. I really recommend it for anyone who needs a new seat.
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Reviewed in the United States on September 6, 2024 by M. Ruth
I've had my Aeron chair for nearly ten years. I picked it up used to replace my crappy old chair from one of the big box stores when it finally gave up the ghost. So recently I heard a "crack" and saw that the back frame of the seat had finally worn down and broken. I was beside myself. I didn't want to buy another chair, so I looked for repair shops in the area. One of the shops referred me direct to this product page and said, "order this, and if you want, I can install it." So I did. Fast forward and, still sitting on the broken seat, busy with work, I decided to look up what the repair entailed. I found a tutorial on youtube. Four bolts for the seat. Two nuts to transfer the j-bars. I figured I could handle it. This replacement seat kit came with the hex wrench needed to undo the seat, and a fitted wrench and a T25 torx driver to quickly transfer the j-bar. It took a few minutes, and a bit of leaning in because the bolts were really in there, but the replacement was easy. I literally didn't take out my toolbox because I had everything I needed in the kit. Really well designed chair and replacement was super easy. Five stars.
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Reviewed in the United States on January 11, 2023 by Matthew Medeiros