Thumbnails are minature representations of an image or page. They provide a convenient way to electronically "thumb" through many images/pages before retrieving the one you need. In this experiment, we measured subjects' recognition speed to thumbnails of five sizes. Eighteen subjects described the thumbnail shown to them through a automated information collection retrieval system (written in Visual Basic). Their response time was measured objectively and their description of the thumbnail was evaluated subjectively. The five thumbnails (treatments) used in this experiment were: 50 x 35 pixels, 70 x 39 pixels, 90 x 63 pixels, 110 x 78 pixels, and 130 x 92 pixels. We found the 90 x 63 pixel treatment to maximize recognition levels while minimizing the time to recognition. Also, if designers create thumbnails too small, they will be misinterpretted frequently; we believe this level of too small is near 70x39 pixels. An important corollary we make is near 110x78 pixels, the time it takes to recognize an image begins to increase (belying the notion "bigger is better").