by the size:
 

800 x 600 1024 x 768 1280 x 1024

Download Instructions:
PC: Click the image link relative to your desktop size, then right-click on the enlarged image and select "Set as Wallpaper".
Mac: Click the image link relative to your desktop size, then click and drag the image to your desktop. Next from the Apple menu select "Control Panel" then select "Appearance". Finally, select "Desktop," select "Add Picture," select the image you just dragged to your desktop, click "Set Desktop".

To determine desktop size:
PC: Right-click on background of current desktop, select "Properties," select "Settings" tab, see "Screen Resolution" for desktop size (e.g., 1280 by 1024 pixels).
Mac: From the Apple menu select "Control Panel," select "Monitors," see "Resolution" for desktop size (e.g., 1280 x 1024, 85Hz)..

Cat and Mouse

by the size:

 

800 x 600 1024 x 768 1280 x 1024

by the size:

800 x 600 1024 x 768 1280 x 1024