Do you have a teacher who can help you? It would be better than asking here. I would consider buying an adjustable stool. I own this one and it is pretty nice, although I could use some more padding on the seat. http://www.gollihurmusic.com/produc...PERFORMANCE_CHAIR_STOOL_FOR_UPRIGHT_BASS.html +1 for Seamist's post. It is possible that the combination of your height and arm length may require a small bass. Again, a good teacher is very important.