Supply Size (& thus Usage) might not match your actual size. For example, both Caelians (Size 3) and Hoburgs (Size 1) are Supply Size 2.
The following applies to Supply Size:
Size 1 | Size 2 | Size 3 | Size 4 | Size 5 | Size 6 | |
---|---|---|---|---|---|---|
0 | 1 | 2 | 3 | 4 | 5 |
Note that this is not told to you directly, unlike Supply Bonus or Gluttony.