funboard to shortboard

I'm stepping off of my funboard (7'6") and getting ready to buy a shortboard. I plan on going with a channel islands flyer but i'm not sure about the length and width i should get.
It is supposed to be ridden a little shorter and a little wider than your normal shortboard but i don't know what my normal shortboard length and width are. I'm 6'4 and i weigh about 150 lbs. If anyone can help me determine what the best length for me is, well, It would be greatly appreciated. Thanks in advance.
It is supposed to be ridden a little shorter and a little wider than your normal shortboard but i don't know what my normal shortboard length and width are. I'm 6'4 and i weigh about 150 lbs. If anyone can help me determine what the best length for me is, well, It would be greatly appreciated. Thanks in advance.