I was going to point out that the cheeseburger today is different than it was in 1948, but many sites suggest they are exactly the same:

https://www.quora.com/How-big-was-McDonalds-original-hamburg...

It's that our idea of a cheeseburger and our appetites have gotten larger.

A McDonalds cheeseburger is what it was in 1948 in name only.