It is not a one size fits all thing with a chair. It depends on how your body is made that decides the chair that best fits you. I went to a large office supply store and set in all the ones that would go with sewing. I finally found mine at Sam's Club. it is a fact that height matters a lot so find one that you can raise and lower. I have RA. and my spine is a mess so I have to be very careful. Someone gave me the wonderful advice on here, to out door stops in the back of my machine to raise it forward. That has taken a lot of stress from my back and I can sew longer.