Check out Fashionation's Eco-Speakers that measure a mere 3.25" in height, width and depth. These speakers are green in nature, so all you Greenpeace activists out there will be able to pick up a pair in peace. In addition to being tiny, they are also lightweight and follow Ikea's flat packing principle, capable of being folded flat for extra portability. You will be able to choose from various colors and patterns, and best of all is you don't have to lug around additional batteries since the Eco-Speakers will draw power from your portable media player. Sound quality isn't all that great though, as one can expect from a speaker of such caliber. The Eco-Speakers are priced from $9.99 to $14.95, depending on where you pick it up.