Maybe this Beneteau install pic will help. We used an extruded solid PVC rub rail material, it extends 2" and is wider at the base where it attaches to the hull. It tapers to about 1 1/8" and is capped by a solid-back stainless steel rub strake. The PVC was awlgripped to match the hull. In the shop it looked massive, on the boat it is barely noticeable...until you touch the dock and it does its job!