Sighs says

There is varied opinion as to the most significant or well regarded novella and all one list did was point out that The Little Prince is one, necessitating a revision of that 'biggest selling novels' list to include Vardi Wala Gunda, written in Hindi by Ved Prakash Sharma and selling more than 80 million copies.

Scholars bicker over the length of some works, debating as to whether they should be short stories not novellas or novellas not novels. There are enough mentions of An Occurrence at Owl Creek Bridge in the short story category and A Clockwork Orange in novellas to award some recognition. The Lottery by Shirley Jackson also leapt out at me; probably more because I remember reading it in the horror collection I had - often buying these at second-hand bookshops and reading them on the train.

Goodreads declare Animal Farm as triumphant among novellas. George Orwell is ever in vogue.

Leo Tolstoy, whose work War and Peace is always cited for its doorstop status, shows he was a  master of the novella also with The Death of Ivan Ilyich

Charles Dickens, master novelist, is likewise recognized for both short story The Signal Man and novella A Christmas Carol and for the collection of short pieces Sketches by Boz

Due to its size, and the fact that the top examples of the novella form are literary, there is no doubt that there are and will be endless dissertations on such classics as Of Mice and Men by John Steinbeck, Breakfast at Tiffany's by Truman Capote, The Old Man and the Sea by Ernest Hemingway, The Metamorphosis by Franz Kafka, The Stranger by Albert Camus, The Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson and Heart of Darkness by Joseph Conrad.

II

If you're like me, you would look up other people's selections of great short story collections out of interest or for fun. It just so happens the short story is next.

When you just look up best short stories, Google gives you a row of short stories with the cover of the book each is in. Leading off is The Lottery and The Signal-Man is also prominent. Those blurred lines become more apparent when you see works classified elsewhere as novellas appearing again. Authors do legitimately reappear here though for the short stories they've written. Hemingway and Kafka. Edgar Allen Poe must have every one of those tales of mystery and imagination featured.
There are just the kind of stories you would expect like The Celebrated Jumping Frog of Calaveras County and Rip van Winkle, then there's ones I keep seeing mentioned such as The Yellow Wallpaper by Charlotte Perkins Gilman and there's ones I hopefully still have in a yellowing paperback stored in a box; The Ones Who Walk Away from Omelas by Ursula K. Le Guin and The Monkey's Paw by W.W. Jacobs
I could rave about Guy de Maupassant or ponder at how To Build a Fire by Jack London is completely new to me when it is held in such high regard. Perhaps I've just forgotten the title.

A Good Man Is Hard to Find by Flannery O'Connor, The Gift of the Magi by O.Henry and The Dead James Joyce round out the list. I'm quite sure there would be other conversations about all the short stories we've read, all the quirky tales consumed.

III

Last in the totem is the novelette, not because it is next in size. It either lies between the short story and the novella or it is the same as a novella if perhaps more flippant. Hardly worth talking about one might say.