I am also 5'4" and my sewing table height is 27" which is the best I can do and comfortable. (Any lower and my legs won't fit under the machine--Lol.) My machine is set flush with the cabinet top. The cabinet top was 29 3/4" high when I bought it. I removed the casters and put on sliders to lower it so that my shoulders and back wouldn't hurt. You may need yours a bit higher if your upper arms are waist length.
Hope that helps!
Last edited by Sheddah; 10-12-2016 at 07:54 PM.