How to measure the size of a repo

I want to mirror RPMFusion and eventually the Fedora repos. Is it possible to accurately measure the size of a specific repository or a collection of them before I mirror it?

First link is the wiki and second linkt to the aprox. directory sizes on the mirror servers.
Infrastructure/Mirroring - Fedora Project Wiki


Thank you. I cannot find any equivalent for RPMFusion, so if anyone knows where to find that, please share.

Then, you may not have searched…

It took me 4 seconds to come up with

Strange… I did look for a little while, probably just in the wrong place. Thank you.