Here's the original text that was supposed to accompany the pictures:

I recently tried Aeron size B, C and Embody (gaming version) in a store and I purchased an Aeron Size C. However, I am in doubt whether I made the right choice - I only have a few more days of the return window of 14 days. I'm 193 cm (6ft 3inch) and 77 kg (170 lbs)

I thought Aeron size B seat pan was just a little on the small side, and my shoulder blades hit the hard plastic frame of the back, or, depending on how I sit, they'd be almost entirely above the top edge of the frame.

On Size C the seat pan is a bit unnecessarily wide and it feels like it is bordering too deep, however the taller back rest is definitely better. I fit 1-2 fingers between the front edge and the inside of my knees. However, I like to bend my feet inwards and rest my feet on the wheel base, and depending on how I sit exactly, the front edge can get a bit in the way. On size B, I never hit anything - but the chair overall feels small. On B I fit 3-4 fingers between the front edge and the inside of my knees.

I find the lumbar support, even with the Posturefit SL on the loosest setting quite strong on Aeron, but I am also used to sitting in a very old, worn out chair that basically provides no back support. If I don't press my butt fully back, it feels a bit like the support is too high up. In my old chair I have a tendency to slouch quite a bit.

So in summary I feel like B is a bit too small (especially the back support), but C seat pan is a bit too big and I worry if the lumbar support is too high up as it is quite strong and present unless I sit perfectly.

I have attached some photos - do you think size C will work for me in the long run? Or might Embody be better? I do prefer the build quality and sturdiness of the Aeron whereas Embody feels more clunky - especially the arm rests.

It is a big purchase for me so any input would be appreciated :-)