: This likely describes the physical capacity or dimensions of the storage item (e.g., a "big and wide" 3-zip binder) designed to hold "proper" or official documents.

If this is a specific requirement for a project, legal filing, or organizational system, you may want to verify if it refers to a particular brand of executive organizer or a specific academic standard for submitting papers.

The phrase "Mallu with big _and _ 3zip — proper paper" does not appear to be a standard idiom, official term, or widely documented slang in Malayalam or English. Based on the individual components, it most likely refers to a specific, possibly technical or niche, context:

: In many professional and academic contexts, "proper paper" refers to high-quality document paper (like bond paper) or specific official formats (like legal-sized paper for documentation).

: This is not a standard paper size. It may refer to a specific brand of 3-zip binder , portfolio, or a specialized legal/proper paper storage solution used in professional or academic settings.

: A commonly used, sometimes informal or slang term for a person from Kerala, India, or someone whose native language is Malayalam .