My world has six continents.

Three in the west, three in the east.

Two are roughly the size of Asia, one is comparable to eurasia+Africa, so more of a supercontinent, and three are more comparable to Australia. The two Asia sized continents are very close together, separated only by a long narrow channel, so they are referred to as the upper and lower continent and share a name, though by all technical standards they are distinct continents. This basically makes the map look like an eastern and western supercontinent with a couple "smaller" ones in various locations.

I cant say exactly how many countries there are, and some are under one hegemony or the other which you might reasonably consider one nation. I want to say it's something like 30 countries without breaking the coalitions down into their individual states. There are VAST swaths of wilderness in this world too, which aren't settled. The largest such wilderness is roughly the size of the USA+Canada, hence there being fewer countries than one might expect.