"Adjectives in English absolutely have to be in this order: opinion-size-age-shape-colour-origin-material-purpose Noun.
So you can have a lovely little old rectangular green French silver whittling knife. But if you mess with that word order in the slightest you’ll sound like a maniac.
It’s an odd thing that every English speaker uses that list, but almost none of us could write it out. And as size comes before colour, green great dragons can’t exist."