https://getfedora.org/en/workstation/download/ says 26.9 MB for the OS X download, and 16.6 MB for the Windows one. Both are incorrect, the correct ones are:

$ curl -sI https://getfedora.org/fmw/FedoraMediaWriter-osx-4.1.0.dmg | awk '/Content-Length/ { printf "%.1f\n", $2 / 1024 / 1024 }'
23.4

$ curl -sI https://getfedora.org/fmw/FedoraMediaWriter-win32-4.1.0.exe | awk '/Content-Length/ { printf "%.1f\n", $2 / 1024 / 1024 }'
22.7