We all ask ourselves that question, sometimes fairly often. When we are right, it's great, when were off, well it can be a lot of work or perhaps worse if we really screw up. Most kite manufacturers have wind speed-kite size plots to help riders in choosing kite sizes. Definitely examine your manufacturers recommendations when considering what kite size to use.
Detlef has put together some interesting gudes relating wind speed to kite size on kiteforum at:
http://gallery.kiteforum.com/gallery/albuq10
Check it out. It is a fairly unique and useful presentation on the Internet dealing with kite size vs. wind range. Tell us how it works for you.
His plots have been reproduced below:
Full size
CLICK HERE
Full size:
CLICK HERE
Full size:
CLICK HERE
Full size:
CLICK HERE
Thanks Detlef!