jib sheet line

I have a 18 sol cat and I would like to know what size an what kind of line I should use. The line looks like it might be 5/16 also how much line should it take for the jib?
i PERSONALLY love blended dynema line for sheets. I use robline dingy racing sheets... but there are many. it is soft and doesn't hold water... but its pricey (compared to regular double braid)


Never owning a solcat i have no idea of what the length is). the line diameter will be mostly determined by the blocks its running through.

does the current line fit? if so measure it (or bring it with you when you get it replaced).