I could see on Paper Papers this graphic by Alejandro Tumas (now in National Geographic) and Jorge Portaz published on Clarín.
The circle show the diameter of an anaconda... and it's impressive.
I love this kind of comparisons, and I've used them many times. As for the diameter of the wres of the new bridge of Cádiz...
If comparisons want to show us the actual size of something, there's no best thing than showing the real one.