Super Saiyan 5 is the level after Super Saiyan 4 and can only be obtained by full blooded Saiyans that have trained to a high level.
Looks much like super saiyan four, except the fur and hair turns into a white/silver color and muscle mass increases. The hair length is similar to Super Saiyan 3 and the eyebrows become slightly thinner. The eyes are also lined with a gray color.
The power of a Super Saiyan 5. It depends on how much time the user has spent training in the form and in Super Saiyan 4 form. It highly exceeds Super Saiyan 4, but still isn't a godpower.