The factory line diameter and length for the main sheet is 48' of 7/16 spun braid. This is according to the specifications found on the NAHCA website www.nahca.org
(which redirects you to www.hcs-na.org
). Click on Resources (across the top menu bar), then Technical Information...then select your boat. You will then see a link to Line Lengths.
I am sure others would have recommendations for other diameters depending upon whether you have upgraded the blocks on the boat.
I hope that helps!