I have 3 basic sizes.
The small one is just the same size as the medium, just it has a single middle part which makes it a a little lighter. I'd suggest this for the guys that fish the 3 mile bridge and shallower closer water. Heres a pic:
The medium one has 2 middle pieces and it will work for most boats 18-25 feet
Here is my large one, it has a longer middle section, doubled up and the bar in the middle is bigger.The prongs are all doubled up. This is for 25+ boats.
I also made one for a guy with a jet ski :
The small and mediums are $25 and the large one is $35. Like I said, if you want a special one made or any changes, let me know.