Based on size:
* Thumbnail: This is a common term for very small pictures, typically used as previews or to represent larger images.
* Miniature: This implies a small but detailed picture, often referring to paintings or other artworks.
* Icon: This is often used for small images that represent an object or idea, such as a computer icon.
* Tiny: This is a general term for something very small, and could be used to describe a picture.
* Small-format: This is a general term that can be used to describe any picture that is smaller than a standard size.
Based on purpose:
* Preview: This is a small picture that is used to give a quick view of a larger image.
* Profile picture: This is a small picture that is used to represent a person or organization on a website or social media platform.
* Avatar: Similar to a profile picture, but often used in online games or virtual environments.
* Stamp: This term is used for small pictures that are often printed on objects, like postage stamps.
Other terms:
* Image: This is a general term for any picture, regardless of size.
* Graphic: This term can be used for both large and small pictures, but it often implies that the picture is digital or has been created using computer software.
Ultimately, the best word to use will depend on what you are trying to communicate.