Typically 24 inches is what most pros use at home :) but on NPL we use a 25 inch monitor from ALIENWARE which is this --> https://www.amazon.com/Alienware-25-Gaming-Monitor-Height-Adjustable/dp/B0733YCKM5/ref=sr_1_1?keywords=alienware+25+inch+240hz&qid=1562913788&s=electronics&sr=1-1 but i recommend you get a 24 inch monitor from benq or something like that 144 hz at least :))!
english language link with article:
​