If you have a whisker pole, one thing to keep in mind is the Dead Down Wind set of the largest genoa. I cut my sheets too short on the 32-3.
Now I measure by setting the pole to max clew extension DDW and measure through the turning block on the rail track. Note that It was the inactive sheet that came up short for me in the past --which is a real pain when it comes time to jibe the pole. (It came up short because I like to use the inactive sheet as a downhaul by tucking it under a bow cleat, which adds to the length required)
I'll be needing new sheets pretty soon, and am spooked enough to actually rig the lines, observe, and then measure the lines. Yeah, once burned....
I don't know my current length, but diameter is 1/2".
Now, what line do we recommend? My current double braid is nice and soft. I don't know the name, but anything like stiff halyard line would be a disaster flopping around up there and kinking.