The Legend Of Super Sayajins:

Super Sayajins are Ultra fighting machines that show no mercy. They get stronger with earch level of SSJ. There are four levels of SSJ:

In the first level of Super Sayajin (SSJ) their hair turns gold, raises up, they become quite strict, their eyes turn green, and and their power level increases.

In the second level of Super Sayajin (SSJ2) Their Power levels raise  greatly, their gold hair becomes a little longer, and they look a little bulker, and more strict.

In the third level of Super Sayajin (SSJ 3) their hair gets as long  as the back of their knees, they look much bulker, they are much stricter, they are much more strict, their power levels increse a supremely

In the fourth level of Super Sayajin their hair shortens up a bit, changes form, and turns black, they look a little less bulk but they get much taller, They are not strict at all. They are pretty funny, their eyes change colour, they outside of their eyes turn red and the inside of their eyes turn orange. They get red fur all over their bodies, they get a tail, their clothes change, and their power levels raise a hell of a lot!

Yea. I know there are more level of Super Sayajin. Infact Majin Bebi goes  SSJ 6 in the Bebi saga in Dragonball GT. But SSJ 1-4 are the bacic four levels.