How big is the new world?

We only know part of the NW but do we know how big the entire nw is or how big the revealed part is? We know of some places that are Not on the map e.g. greed kings city. Is the NW a supercontinent or are there islands and smaller continents? I mean papa bonez is OP AF but are there places in the NW with other characters that might be stronger than the ST black scripture (exept Dragon Lords)? Cuz it is stated thar humans are the weakest species and Nazaric is surrounded by human nations and we only know of human nations really. Maruyama sensei stated that there will be a new world alliance and gargantula will eventually battle a golem cavalary afterall. But it would be nice to know how big the potwntial enemy of Nazaric is and if there are other bigger continents with stronger individuals.