Here is one of several websites that sell floating dock hardware.
Floating Dock Shop I saw alot of these items and thought they were overpriced so I made them myself. Yea, I saved a little money, but if I have to ever do it again, I'll just buy a kit! As far as what size, that is preference. I have a 12x12 floating dock. You could probably get away with a little smaller, but there is plenty of room for fun!
