Scooters up to 67″ Length ( Smallest )
Scooter with windshield & rear box up to 70″ Length ( Small )
Scooters  from 67” to 76” Length ( Medium )
Scooters with windshield, sissy bar or rear box, and saddle bags from 67″ to 79″ Length (Medium)
Scooters with windshield, rear box and saddle bags over 80″ Length ( Large / Tall )
Scooters with or without windshield over 80″ Length ( Large )