1/2 inch is more than adequate for your boat. The length of bow and stern lines should equal two-thirds of your boat's overall length. Spring lines should be slightly longer, approximately the same length as your boat. Spring lines keep the boat snugly near the dock by preventing it from moving fore or aft, while allowing for the rise and fall of the tide. Keep in mind; the position of cleats on your boat and dock may affect the length of the dockline. I wouldnt bother with the snubbers if using nylon line. You can buy a 20 ft 1/2 inch double braided line for about $15 already professionally spliced
Thanks delite. uh... although rise & fall of the tide here in the Great Lakes is minimal.
I appreciate the arrangement suggestions, but the question here is more about the type of line; Braid vs. 3-strand.
Yes, I've seen pre-packaged dock lines at local marine shops. And local marine shops will even splice the thimbles in for me at my request as well. The question is which type of line for which purpose. Prepackaged braid dock lines with custom length 3-strand mooring lines? One spool of 3-strand and then I can cut it all myself and have extra for anchor road? Buy braid and learn to splice it myself?