Not too large for a 5'4" person

I got this ball to use as a chair to bounce my baby while I am holding him and at the computer desk. I think it is excellent and has helped with better posture without any thought. I also end up doing some excerises on it just because it is there. It does not have the ultra shiny surface as is noted in the picture. Also it is a pretty standard size I believe and is not too tall for me. I can sit comfortably with my knees at 90 degrees and I am 5'4". As for the reviewers that are not impressed with the pump: well I don't care. I don't plan on deflating and inflating this thing again and again. More detail ...