Magnitude refers to a real number value, like 1, 2, 3 ,4... and so on. While dimension is represented by a symbol or a letter, like "lb" or "m" that serve as a reference of the units. For example, the magnitude can be 50, and its unit "miles or m".
Another examples could be:
Magnitude Unit
8 lbs
10 tbs
1 oz
Thus, dimension can also be called unit
