Units in alphabetical order:
Centigram --> Decigram --> Dekagram --> Gram --> Kilogram --> Pounds --> Megagram --> Slug --> Ton --> Metric Tonne --> u
 

Units in order of magnitude:
u --> Centigram --> Decigram --> Gram --> Dekagram --> Pounds --> Kilogram --> Slug --> Ton --> Megagram & Metric Tonne