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I have this chair which looks exactly the same as the BJ's one. I'm 6'4" and the chair fits my back pretty well.
My only complaint with this chair is that the seat doesn't extend far enough forward and it cant be adjusted. Just measured and there is a 6" gap from where my legs stop touching the chair to the inside edge of my knee. This ergonomics session I went to said it should be just about 3", and I can for sure say that 6" is too much.
That is a Smugdesk ergonomic chair from Amazon, I've had it about a year, highly recommended.
This chair is $220, but if you get it on Amazon Warehouse it will be around $190-210 depending on the condition. I got “good” and the lower back support had a crack. Got a new “good” one sent to me and replaced that piece. It’s comfy and breathable
Personally I love this chair. It does look a bit silly, but I love the thing.
I'm in the US and I know it might be slightly over budget but I really like it so far.
You should be able to find cheaper ones since they're regular office chairs.
Smugdesk Ergonomic Office Chair
This is what I have and I like it.
Well it might not be the same but similar to this