To entice frugal web designers to use Gettyimages.com, the Seattle-based stock photo company now offers licenses for very small images not previously offered on Getty, or even microstock sites such as iStockphoto, Fotolia and Shutterstock.

These micro-images, ideal for web and mobile products, come in two sizes: 170 or 280 pixels wide. Getty expects these types of photos to be used for e-mail, websites, web ads, banners, mobile apps and sites, intranets, web applications and other digital projects...