A single printed sheet of paper of small size, containing preliminrary information relating to a topic is known as

A leaflet is a single printed sheet of paper of small size, containing preliminary information relating to a topic.

Leaflets are typically used for advertising or informative purposes, offering concise and easily accessible information to the reader.

Unlike newsletters or bulletins, which may contain more detailed and varied content, a leaflet focuses on providing essential information in a straightforward format.

Therefore, leaflet = single printed sheet with preliminary information.