The best size fishing rod really depends on what you are doing with it. Shorter rods are more accurate casters, while longer rods can cast farther. Longer, heavier rods also offer more leverage when fighting larger fish. There is no one best size. It all comes down to your comfort and what style of fishing you are doing. , Fishing rod lengths are relative to the type of fishing situation, technique, and species being targeted by the rod and reel. Typically, longer rods are used for more casting distance, and shorter rods for shorter casts and more accuracy. The ideal fishing rod length is determined by many factors and there is not a definitive best when it comes to rod length.