So, you’re curious about the differences between the B, and C sizes of the iconic Herman Miller Aeron Chair? Well, you’ve come to the right place! We’re here to clear up any confusion and help you make an informed decision.

Size B suits average individuals with its standard dimensions, while Size C accommodates taller individuals due to its larger build. The former has narrower arm width and seat depth, while the latter is marked by three dots beneath the top edge of the back frame, distinguishing it from Size B’s two dots.

Aeron Size B vs C: Differences

Size & Weight Capacity

Aeron B is the regular size. It works for lotsa folks, from average height to tall peeps. If you’re an average-sized person, the B is probably gonna be your best bet. It strikes a nice balance between comfort and support, so it’s a popular choice.

Size C is tailored for taller individuals or those weighing over 230 pounds. If you stand at 6’3″ or taller, or fall within that weight range, Size C offers a roomier fit and provides the additional support you require.

To decide between Size B and C, think ’bout your height, weight, and body shape. If you’re tall but not heavy, Size B will do ya just fine. It can handle folks weighing from 125 to 325 pounds. Size C is for those in the 295 to 350-pound range.

Arm Width

Arm width is one of the differences between B and C. Size B measures ’round 18.5 inches, while Size C goes all out with a wider width of ’bout 20.5 inches.

Now, you might think, “What’s the big deal ‘about arm width?” Well, it actually makes a diff in how comfy you feel and how you sit. If you like some extra space to stretch out and move your arms while you work or kick back, then Size C is prob’ly the way to go. Those extra 2 inches give you more freedom and room to do your thang.

On the other hand, if you’re into a tighter fit that makes you feel cozy and secure, then Size B might be your jam. With its slightly narrower arm width of 18.5 inches, you’ll feel snug as a bug in a rug. It keeps you focused on your tasks without feeling all loosey-goosey.

Seat Depth

Size B has a seat depth of about 17 inches, while Size C takes it up a notch with a deeper seat measuring approximately 18.5 inches.

Now, you might be wondering, “What’s the big deal about seat depth?” Well, it can make a significant impact on your comfort and how you sit in the chair. A deeper seat offers more legroom and can be beneficial if you have longer legs or prefer a bit of extra space to stretch out. Size C’s seat depth of 18.5 inches provides that additional room, allowing you to find a comfortable position and sit for extended periods without feeling cramped.

On the other hand, if you’re on the shorter side or prefer a more compact and snug seating experience, Size B’s seat depth of 17 inches might be just right for you. It offers a slightly shallower seat that can provide a more supportive and cozy feel, especially if you like to sit with your feet planted firmly on the ground.

Identification Marks

Finding out the size of your Herman Miller Aeron chair is easy. Just look under the top edge of the back frame, across from the Herman Miller Logo. You’ll see some raised dots. These dots tell you the chair’s size without any confusion.

Size A: If you feel one dot, then you’ve got yourself a Size Aeron. That’s the Size A chair, perfect for those who are 5’4″ or shorter.

Size B: If you come across two dots, then it’s the B Size Aeron for you. That’s the regular-sized chair that fits most folks in the middle range.

Size C: And if you feel three dots, well, you’ve hit the jackpot with the C Size Aeron. That’s the big boy chair, designed for the tall peeps who are 6’3″ or taller.

Aeron Size B vs C: Similarities

Seat Height

Size B and Size C provide the same range of seat height adjustment, so you have the freedom to customize it to your preferred level. Whether you’re on the shorter side and need a lower seat height or you’re taller and require a higher position, both Size B and Size C have got you covered.


In a nutshell, the differences between Size B and Size C chairs are pretty darn important and cater to folks’ specific needs. Size B is all about regular folks, giving ’em a comfy seatin’ option with narrower arm width and seat depth. It’s your go-to if you’re lookin’ for a standard chair.

Size C, this bad boy is tailor-made for them tall fellas. It’s got wider dimensions and extra comfort features to accommodate those with more height. The bigger arm width and seat depth in Size C ensure there’s plenty of space and support for those who need it. Can’t have tall folks squishing into a regular-sized chair, right?

Now, if you’re tryin’ to spot the difference between these two sizes, just take a gander at the back frame. Size B rocks two dots, while Size C flaunts three dots. Easy peasy, right?

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