String Theory

The strings in string theory are unimaginably small. The average string if it exists, is about 10 to the minus 33 centimeters long. That's a millionth of a billionth of a billionth of a billionth of a centimeter. In comparison if an atom were magnified to the size of the solar system a string would be the size a tree. Now if you think thats small a planck length is even smaller at 10 to the minus 36 meters. To give an example of this length, if we take a football field and make it the size of the observable universe the planck length becomes the size of an atom.