The Whole Enchilada?

I could never understand the term, "the whole enchilada". What's so big about an enchilada? I can eat three of them. Maybe "the whole burrito" would be a better term because some of those are the size of a football. 

Come to find out that the phrase "the whole enchilada" is an idiomatic expression that has nothing to do with the actual size of an enchilada. It's a metaphorical expression that means "the entire thing" or "everything included." It's often used to describe a situation in which someone is getting everything they want or need, all at once.

The phrase is thought to have originated in the 1960s in the southwestern United States, where enchiladas are a popular dish. The idea is that if you're getting "the whole enchilada," you're getting the entire package, with all the fixings, just like an enchilada comes with all its fillings and toppings.

So, it's not about the size of the enchilada, but rather about getting everything that comes with it. 

I suppose the suggestion of "the whole burrito" is clever, but "the whole enchilada" has become a common and widely recognized phrase in American English.