This image was found in Inky's Linkies: Herp Gallery
Another kind of really big frog are called Cane toads, (also called "marine toads" or "giant toads"). Adult marine toads generally range in size from 6-9 inches (15-23 centimeters), but may get larger.
This image is from the Frogs of the Townsville Region page. Click on it to see it full-sized!Some species of bullfrogs get pretty big too.