This may sound obvious to the experts here however, the one thing I find confusing is deciding on hook size per made up rig. Clearly, fish type, size of mouth, feeding methods, specimen size etc have a big impact however, lets say I head for a couple of days in search of that elusive big carp. Do I go for a size 4 hook on 20lb line or would it be equally OK to use a smaller size 10. Clearly I don't want to miss the 10 pounders and dearly want to hook the 25 pounder but does the hook size make a difference here or at the end of the day, is it more about presentation of the hook than size? Generally and by rule of thumb, I increase hook size with the breaking strain of the tippet which hasn't really let me down however, I am curious as to how others make the choice as there doesn't seem to be a logical science other than fish size to hook size. I.E. The bigger the target fish, the bigger the bigger the hook, the bigger the breaking strain. I am catching the carp so probably have it close to being correct but what is the rule of thumb for the experts here?