Egonomically, I think one should be able to have both feet flat on the floor and sitting comfortably, have a 45' angle of their elbows when both hands are on the bed of the machine. I'm 5'3" and with my Bernina 440 acrylic table the height is 29". I couldn't find a sewing table or cabinet that was low enough. I bought an ECR adjustable youth table and absolutely love it. I don't feel like my chair is going to roll away from the foot petal and my shoulders aren't all hunched up. I am able to sew for hours now.