How long should the guy lines be?

I cut my guylines quite long at 2.5 to 3m on the basis that it is easy to shorten them (or cut them in two for other things). I put a large figure of eight on the bite in each end to larks foot onto the a tie in point and for the peg. I often use the same guyline from two tie in points, one of which must be tied.

(The length and number of your guy lines depends on how you prefer to pitch your ShellTA.)