There are lots of Clip Arts, small stock photos, thumbnail photos, free clipart, office word clip arts available on the Internet that you can search for. Below is a site specially for small clip art seekers.
WPClipart is a suitable site for those who want to find good quality Public domain clip art optimized for use with Word Processors, printable images that have no copyright restrictions specializing in use for education or websites.
There are thousands of color graphic clips as well as illustrations, photographs and black and white line art. All are available in lossless, PNG format.
Currently, there are over 25,046 images on the site. Below is a snap-shoot of the site.
Besides, the WPclipart server can convert any image up to 600 pixels in width or height to a JPG image format.