What do you call each "part" or "content piece" of a magazine?

I'm trying to come up with the right term to refer to a "part" of a magazine. That is, one word that can refer to any "piece of content" within an issue of a magazine: the "leader", any individual "letter from the readers" (not the entire page of "letters from the readers"), any "article" or any other kind of... "content piece".

What do you call these? It can't be "pages", because a "piece of content" can be much less (or more) than one page.

"Entities"? "Content blobs"? I don't even know the correct word in my native language, so I can't translate it to find out.

Solution 1:

There doesn't seem to be a single catch-all term.

There is no such word on this thesaurus entry for Parts of newspapers and magazines, by Macmillan dictionary.

I also looked at a number of sources that explain the organization and structure of magazines. Here are two typical examples of those and of the words they use:

Parts of the Magazine
In each magazine, there are a number of items and articles, long and short, that engage and entertain readers. (source)

Structure of the Magazine
Magazines consist of four parts. Cover pages, front of the book, feature well and back of the book. (source)