I'm plus size and this chair fits me perfectly.  The adjustable height makes it work perfectly when sitting at my standing desk because the profile of the desk raised my desktop about 5 inches - since this chair gets higher than normal desk chairs, it's a perfect fit for the standing desk.  I do wish there was an adjustment on the back (or it would have gotten 5 stars) for the 'lumbar' support, but it's mesh, so there's no way to adjust.  Was easy to assemble, which I did that on my own in less than an hour with no additional tools - everything was in the box.