fish’s vision. you have to figure that they are not going to be seeing what you see, on top of the water, but instead only what is underneath which is their view.
the size of whatever is moving is going to have to be large enough to catch their attention but then at the same time you don’t want it to be so big that it is going to scare the fish off. you really want to stick with a happy medium and make sure that you are going to get the right sized lure.
now another tip to help when you are trying to choose the right lure size for bass 