Aeron Size A or B Dilemma

I am looking to buy an Aeron remastered but am unsure what size would be a better fit for me. According to Herman Miller’s size chart, I fall into the size A or B category. I am leaning towards A because the seat depth might be better but am worried the seat width might be too small. If I go with size B, I am worried the edge of the seat will hit the back of my knee/leg. I am 5’4 and 115 lbs. Which size do you think would be the better fit?