How large (file size) should character mesh be?

Any insight into roughly how large (or what would be too large) a character mesh should be for ps4/xbox level hardware assuming a 3rd person camera angle.

How long should I make a piece of string? It’s a piece of string I’ll use to tie my tablecloth to the table when it’s windy.
How much will it cost to build a tree fort?
How much wood could a woodchuck chuck if a woodchuck could chuck wood?

The answer to your question is: As large as needed to get the look/performance trade-off you want, and no larger.
20,000 polys? Could do with 5,000. Could do with 100,000. Depends entirely on look, perspective, desire, and scene.

I guess I am asking is there a general range that above which would be considered “on the high end for a character model”. Or is there not really a norm for that?