Jetski- if you have a current bike that you find comfortable, try and base the measurements off of that.
Otherwise- go try out some bike in an Evans (or other chain cycling shop) for size.
Finally, try the fit calculator on Competitive Cyclist: http://www.competitivecyclist.com/Store/catalog/fitCalculatorBike.jsp
Jetski- if you have a current bike that you find comfortable, try and base the measurements off of that.
Otherwise- go try out some bike in an Evans (or other chain cycling shop) for size.
Finally, try the fit calculator on Competitive Cyclist:
http://www.competitivecyclist.com/Store/catalog/fitCalculatorBike.jsp