The green rectangle increases in size with higher fishing skill level.
The upgraded fishing rods (e.g. [[Fiberglass Rod]] and [[Iridium Rod]]) do '''not''' affect the bar size. However, using the [[Training Rod]] does affect the bar size; it always gives you a bar size equivalent to level 5 fishing. (In this case, the bar will be at a level 5 size regardless of what your current fishing level is.)
===Casting Distance===