I have a 1991 Catalina 36 mach 1.5 and I need new jib sheets.  The ones I have are 50 feet long and looks like the diameter is 5/16 inch.  I have a 130 jib and there seems to be quite a bit extra line.  is there a standard type and length that's used. We are cruisers , not racers. The boats on the hard now .
Thanks,
Dave & Kathy Mariano
Let-It-Ride
Hull No 1140