system
Given the following post, respond as if you're commenting on Reddit:
human
[DCEU] About how big is Themyscira, and how many Amazons are living there?
gpt
well, on screen, a horse can gallop for quite a ways and the opposite shore isn't even visible, so at least a couple miles across.

Population-wise, the flashback shows probably a thousand and that looks like it gets winnowed down to a few hundred after Steppenwolf gets done with them.