What is a good refresh rate and screen size for a gamer ?

i will buy a new pc but i am considering about buying a new screen . should i buy one or to stay in the old ? just tell me the minimum characteristics of a gamer's screenWhat is a good refresh rate and screen size for a gamer ?at least 20 inches,at least 5ms responce time. at least 1,000,000:1 contrast ratio. if u plan to run eyefinity the screnn size could be smaller.What is a good refresh rate and screen size for a gamer ?i'd say around 24" minimum for the best experience and a refresh rate of 70+ is fine to limit eye strain and headaches for those long gaming periodsWhat is a good refresh rate and screen size for a gamer ?1. One you can afford, 2. Depends on what you prefer the size to be 19 to 20 is bout a good enough size for most.