Fishing Rod Tops

All fishing rod tip tops have 2 important dimensions, the tube size and the ring size. The tube size is the inside diameter of the tube that accepts your rod blanks. Tube sizes are measured in 64ths of an inch. A tube size of 5.0 equals 5/64 of an inch inside diameter.
The ring size of a tip tp refers to the size of the ring that your fishing line passes through. For most freshwater fishing rods, a size 8 ring is common. It is common on saltwater fishing rods for ring sizes to increase as tube sizes increases.