How huge is the open world in this game?

I only play open world games (Far Cry, Ghost Recon Wildlands, Skyrim, Fallout 4, GTA5, Just Cause 3 etc.)

This game BL4 has caught my attention. It looks great and goofy - right up my street 😃

I gather it is open world but was wondering how huge it is.

What older games can we compare its map size to? Ginornous like Just Cause 3 or big-ish like GTA5?