Tubs, how big is too big?

[bcr229]

I know there is such a thing as too big for ball python tubs. I found these tubs that are about same width as CB-70s, same height, but 10 - 15cm longer. They are very cheap. I wonder if they would be too big?

What are they? With adult females the size of the tub isn't the only issue. You also don't want one that's flimsy and will crack easily.