Adjectival hierarchy refers to the order in which adjectives are to be used if they are attached to a noun. This is also known as prenominal adjective order.

Mark Forsyth in The Elements of Eloquence

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.

In English, the standard order of adjectives follow a sequence (via Wikipedia):

1. Opinion – limiter adjectives (e.g. a real hero, a perfect idiot) and adjectives of subjective measure (e.g. beautiful, interesting) or value (e.g. good, bad, costly)
2. Size – adjectives denoting physical size (e.g. tiny, big, extensive)
3. Shape or physical quality – adjectives describing more detailed physical attributes than overall size (e.g. round, sharp, swollen, thin)
4. Age – adjectives denoting age (e.g. young, old, new, ancient, six-year-old)
5. Colour – adjectives denoting colour or pattern (e.g. white, black, pale, spotted)
6. Origin – denominal adjectives denoting source (e.g. French, volcanic, extraterrestrial)
7. Material – denominal adjectives denoting what something is made of (e.g., woollen, metallic, wooden)
8. Qualifier/purpose – final limiter, which sometimes forms part of the (compound) noun (e.g., rocking chair, hunting cabin, passenger car, book cover)