Is large common or proper noun?

"Large" is an adjective, not a noun. It describes a quality or characteristic of something.

Here's the breakdown:

* Common Nouns: These are general names for people, places, things, or ideas (e.g., dog, city, book, happiness).

* Proper Nouns: These are specific names for people, places, things, or ideas (e.g., Fido, Paris, The Lord of the Rings, Christianity).

Since "large" doesn't refer to a specific person, place, thing, or idea, it's not a noun at all.