---
product_id: 234779553
title: "Replacement Seat for Herman Miller Classic Aeron Size B Medium (Black Mesh)"
brand: "foamon"
price: "€ 383.03"
currency: EUR
in_stock: true
reviews_count: 13
category: "Foamon"
url: https://www.desertcart.pt/products/234779553-replacement-seat-for-herman-miller-classic-aeron-size-b-medium
store_origin: PT
region: Portugal
---

# Easy pre-assembled install Exact fit for Aeron Size B Durable graphite mesh seat Replacement Seat for Herman Miller Classic Aeron Size B Medium (Black Mesh)

**Brand:** foamon
**Price:** € 383.03
**Availability:** ✅ In Stock

## Summary

> 🪑 Upgrade your throne: Classic comfort, zero compromises.

## Quick Answers

- **What is this?** Replacement Seat for Herman Miller Classic Aeron Size B Medium (Black Mesh) by foamon
- **How much does it cost?** € 383.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/234779553-replacement-seat-for-herman-miller-classic-aeron-size-b-medium)

## Best For

- foamon enthusiasts

## Why This Product

- Trusted foamon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Complete Seat Assembly:** Not just a cover—this is a full seat replacement with original stretch material, reviving your chair’s premium feel and durability.
- • **Effortless Installation:** Pre-assembled with included tools and clear instructions, get your chair back to peak performance in under 20 minutes—no extra hardware needed.
- • **Sustainable Investment in Comfort:** Extend the life of your beloved Aeron chair with a replacement seat that matches original specs and quality, avoiding costly full-chair replacements.
- • **Breathable Graphite Mesh Suspension:** Experience ergonomic support with tensioned black mesh that promotes airflow, keeping you cool during marathon work sessions.
- • **Precision Fit for Classic Aeron Size B:** Engineered exclusively for the original Classic Aeron Size B, ensuring flawless compatibility and restoring your chair’s iconic comfort.

## Overview

This Replacement Seat is a full assembly designed exclusively for the Herman Miller Classic Aeron Size B Medium chair. Featuring durable graphite mesh that maintains ergonomic support and airflow, it measures precisely 20.25"W x 18"D x 5.8"H to ensure perfect fit and alignment. Pre-assembled with included tools, it offers a straightforward installation process without extra hardware. Ideal for professionals seeking to restore their iconic Aeron chair’s comfort and longevity with an authentic, high-quality replacement.

## Description

[Compatible with Classic Aeron Size B Only] Designed to fit Herman Miller Classic Aeron Chair Size B Medium. Not compatible with Remastered models. [Full Mesh Seat Replacement] Complete seat assembly with tensioned black mesh to replace worn, sagging, or torn seats. [Exact Dimensions for Proper Fit] Measures 20.25 inches wide x 18 inches deep x 5.8 inches high for accurate alignment with the original frame. [Durable Graphite Mesh] Strong suspension mesh provides firm ergonomic support and maintains airflow during long sitting periods. [Easy Installation] Pre assembled seat includes instructions for straightforward replacement. No additional hardware required.

Review: Perfect seat replacement for my size B Aeron chair - I have an Aeron chair (size B) that I bought in the late 90s. A few years ago the seat started to tear. Not bad after 20+ years of almost daily use. I bought a replacement mesh which turned out to be a bad idea. It didn't quite fit and it wasn't made of the same stretch material as the original seat. Ok, lesson learned there. So I bought this and it was a perfect replacement. It's an entire new seat, not just the mesh. The mesh is the same stretchy material as the original. It looks identical to the original seat as far as I can tell. Replacing the seat was pretty easy. The instructions were good and it came with the tools needed. I think it took about 20 minutes and I was done. If you've made an investment in this chair, I think it's worth it to spend a little more getting this replacement seat so you have the official product. I'm writing this review 2.5 years later in Feb 2026 and the seat is still great. Zero problems, no regrets.
Review: Perfect Fit - It fit perfectly. The color is an almost identical match. All necessary tools (of good quality) were included, as were a pair of work gloves. The instructions were useless, but you won’t need them anyway. To remove the old seat, take out the big bolts first, then the small ones. To install the new seat, install the small bolts first, then the big ones. There was also a metal flange clipped to the back of the old seat. I don’t know what purpose it serves, but I moved it to the new one.

## Features

- [Compatible with Classic Aeron Size B Only] Designed to fit Herman Miller Classic Aeron Chair Size B Medium. Not compatible with Remastered models.
- [Full Mesh Seat Replacement] Complete seat assembly with tensioned black mesh to replace worn, sagging, or torn seats.
- [Exact Dimensions for Proper Fit] Measures 20.25 inches wide x 18 inches deep x 5.8 inches high for accurate alignment with the original frame.
- [Durable Graphite Mesh] Strong suspension mesh provides firm ergonomic support and maintains airflow during long sitting periods.
- [Easy Installation] Pre assembled seat includes instructions for straightforward replacement. No additional hardware required.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08KGWXM9N |
| Additional Features | Adjustable Headrest |
| Age Range Description | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | Included |
| Back Style | Solid Back |
| Best Sellers Rank | #88,977 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #604 in Home Office Desk Chairs #666 in Lawn Mower Accessories |
| Brand | FOAMON |
| Brand Name | FOAMON |
| Chair Backrest Width | 20.25 Inches |
| Color | Graphite |
| Cushion Style | Boxed Edge |
| Customer Reviews | 4.3 out of 5 stars 231 Reviews |
| Fill Material | Foam |
| Finish Types | Powder Coated |
| Frame Material Type | Plastic |
| Furniture Base Movement | Swivel |
| Included Components | Cushion |
| Is Foldable | No |
| Item Depth | 18 inches |
| Item Dimensions | 18 x 20.25 x 6 inches |
| Item Dimensions D x W x H | 18"D x 20.2"W x 5.8"H |
| Item Weight | 4.6 Pounds |
| Leg Style | Pedestal |
| Manufacturer | FoamOn |
| Manufacturer Part Number | 123 |
| Material | Plastic |
| Material Type | Plastic |
| Maximum Weight Recommendation | 250 Pounds |
| Model Name | B3D01 |
| Model Number | B3D01 |
| Pattern | Classic |
| Product Care Instructions | Wipe Clean |
| Product Dimensions | 18"D x 20.2"W x 5.8"H |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Chair |
| Required Assembly | Yes |
| Seat Depth | 18 inches |
| Seat Material | Fabric |
| Shape | Rectangular Prism |
| Size | Medium |
| Style Name | Modern |
| Surface Recommendation | Hard Floor |
| Theme | Professional classic |
| Tilting | No |
| UPC | 860003555958 860003555965 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** FOAMON
- **Color:** Graphite
- **Material:** Plastic
- **Product Dimensions:** 18"D x 20.2"W x 5.8"H
- **Size:** Medium

## Images

![Replacement Seat for Herman Miller Classic Aeron Size B Medium (Black Mesh) - Image 1](https://m.media-amazon.com/images/I/81ltV-VOMfL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Made a mistake; bought a c by mistake. due illness i missed the july 28th cutoff. might you grand me an exception as a fellow small business owner?**
A: Hello. All our products are being fulfilled by Amazon. Regarding Return and Refund also being handled by Amazon. We don't have the ability to modify or amend Amazon's Terms and Policies on our end. Thank you for your understanding.

**Q: Hi will this fit my FO# 574285 101?**
A: Somewhere on these chairs the size is imprinted. Mine is a sixe B although I cannot tell you if that is a match to your FO# above. There is a tutorial on UTube that will show you how to confirm size and replace the insert, which is tricky.

**Q: Will the size B seat fit a size C chair if I wanted to down size?**
A: No. Many assume Size B will fit into Size C. 
But unfortunately The Size B never fit size C and vice versa.

**Q: Hello! cab you confimr that this will fit my chair? i have a size b and found these 2 codes under the chair: ae223awb & hmb-ae1-0005949. thank yo**
A: Yes this code is Size B

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect seat replacement for my size B Aeron chair
*by M***T on February 4, 2026*

I have an Aeron chair (size B) that I bought in the late 90s. A few years ago the seat started to tear. Not bad after 20+ years of almost daily use. I bought a replacement mesh which turned out to be a bad idea. It didn't quite fit and it wasn't made of the same stretch material as the original seat. Ok, lesson learned there. So I bought this and it was a perfect replacement. It's an entire new seat, not just the mesh. The mesh is the same stretchy material as the original. It looks identical to the original seat as far as I can tell. Replacing the seat was pretty easy. The instructions were good and it came with the tools needed. I think it took about 20 minutes and I was done. If you've made an investment in this chair, I think it's worth it to spend a little more getting this replacement seat so you have the official product. I'm writing this review 2.5 years later in Feb 2026 and the seat is still great. Zero problems, no regrets.

### ⭐⭐⭐⭐⭐ Perfect Fit
*by B***G on March 18, 2026*

It fit perfectly. The color is an almost identical match. All necessary tools (of good quality) were included, as were a pair of work gloves. The instructions were useless, but you won’t need them anyway. To remove the old seat, take out the big bolts first, then the small ones. To install the new seat, install the small bolts first, then the big ones. There was also a metal flange clipped to the back of the old seat. I don’t know what purpose it serves, but I moved it to the new one.

### ⭐⭐⭐⭐⭐ Perfect Replacement – Feels Just Like the Original
*by H***S on April 29, 2025*

This replacement seat for my Size B Aeron chair fit perfectly and matched the original in both comfort and quality. The mesh feels sturdy, supportive, and identical to what came with the chair originally. Installation was simple, and once it was on, I honestly couldn’t tell the difference. If you’re looking to refresh your chair without replacing the whole thing, this is the way to go. Solid product.

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**Shop now:** [https://www.desertcart.pt/products/234779553-replacement-seat-for-herman-miller-classic-aeron-size-b-medium](https://www.desertcart.pt/products/234779553-replacement-seat-for-herman-miller-classic-aeron-size-b-medium)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-06-04*