So the top one in a house I don't recognise, and the bottom one on a web ... a black widow or red something ... As you maybe able to tell, I'm not really a spider fan!
As long as they're not inside my house, (and if they were, I would take them outside) I'd say it's fine. They deserve somewhere nice to live (as long as it isn't. inside my house)
If they're calling 25cm the size of a pizza... I'm doubting the rest. Size of an adult male's hand? I'm small, and being generous, the width of my palm is 90cm.
from Wiki:
Adult females can have bodies of slightly over 20mm in length with a span of 70mm including their legs.
That's the size of the largest banana spiders I've seen. In FLORIDA.