Super Saiyan 5 is the successor to Super Saiyan 4. The only confirmed users of this form are: Goku, Vegeta, Vegeto. The possible users are: Gohan, Broly, Goten, Trunks, Future Trunks, Kara.
Super Saiyan 5 has white hair and fur. It's similiar to Super Saiyan 4. Super Saiyan 5 has also white aura, and white eyes. Anyone at the SS5 state can turn their eyes black. Goku and Vegeta used this form to beat Lord Erion's General, but their attacks weren't effective, so they fused into the Vegito with the Potara earnings.