It's not going to be elaborate. It's not even going to make it into the final work. It's just going to make sure that the characters can hit all the destinations described with a reader going that this country is north of that one, and the third is to the west of the northerly one, and yet somehow east of the other -- especially given the most are the size of postage stamps and the larger ones are at most tenfold larger. It's not a story where non-Euclidean geography helps.
At one point, a king of a large one (the large one, hmmm. . . .) will say to a princess of a small one that a sovereign of hers can climb a tower and see his borders in all directions. She will say it's false and think that even their most wicked kings would think that a waste of money, building a tower that large.