How big can a ribbon snake get?

well usually it could be 8 foot tall so in my calculation's 4 to 5 people can hold it from the mouth to the tail so f off

It depends what species you're referring to - It could be anywhere from a few inches (as the the species called a 'Flowerpot snake') right up to 30-plus feet (for a full-grown Reticulated python) !

It Depends on what kind of snake.

Well, that would be the same as asking how big can, for example, felines can get. There are a few dozens of feline species, and no one can answer that they reach this or that size, since a tiger and...

Because some reptiles see other reptiles as food. It's nature for large things to prey on smaller ones.