Yeah, it’s confusing for Americans in Europe, too, where, like you say, “peperone/i” means what we call “peperoncini” in America.
And salami comes in all different sizes. Standard American-style deli salami, which is relatively soft and is usually easily foldable, comes in sizes about 4"-4.5" in diameter. Italian-style salami is generally anywhere from 1.5"-3.5" diameter, and is usually a firmer product that will not fold. Same with Hungarian-style salami.