The free sample images:

One 200 pixel GIF on a white background at 72 dpi.

One 200 pixel PNG on a transparent background at 72 dpi.

Purchased single images:

One 200 pixel EPS, scaleable to any size or resolution.

One 200 pixel TIF, scaleable to any size or resolution.

One 2000 pixel JPG on a white background at 300 dpi.

Purchased scaleable collection:

714 EPS and TIF files, 200 pixels, 72 dpi, scaleable to any size or resolution.

Purchased JPG collection:

714 JPG files at 2000 pixels and 300 dpi.

To test if the file types are compatible with your image program, please download this sample.