imagesize:WIDTHxHEIGHT.
Here's an example: [imagesize:640x480 muffin] finds 640px x 480px images related to muffins.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgizbuSFW8kfeXoG6FnkiSVi2u_jWGN_xQGLU0RZmQcD2TuyG2Cs-3zOYjsbUFpcDpn-PhjviBpN3-6e3MPZed5AjjB92SzWbzhj3wjeDLuLjnO7Rp_ncn0nATYSuV-CAkn-9GLcf_ulfxS/s640/image-size-search.jpg)
The operator could be useful if you need to find wallpapers for your computer, logos, illustrations for a school project or any other images that have standard sizes.
{ Thanks, Michael Garmahis. }