Author Jason Pargin explains the unwritten yet closely followed English grammar rule that dictates the order in which adjectives are used in a sentence. He uses the example of a “fun little red rubber ball”, noting that if any of the descriptors were moved to a different place within the phrase, it would sound odd.
‘It’s a fun little red rubber ball’, but if you put those in any other order like ‘rubber fun red little ball’, now it becomes nonsense.