what's the size of the rescue disk downloads?

title. should really be shown on the UI. does the devs expect the users to search the whole internet just for that?

https://forum.avast.com/index.php?board=6.0

does the devs expect the users to search the whole internet just for that?
No, only the correct forum section and FAQ section ;)

Search and find >> https://support.avast.com/support/home

Rescue disk >> https://www.avast.com/faq.php?article=AVKB114#artTitle

The downloads don’t have a fixed size.

From the FAQ:

An empty USB drive with capacity 500 MB or higher
That is for the extracted files, meaning the download is (a lot) smaller.