Power/durability/precision/speed:

None: nonexistent

E: very weak/immensely lower than human capabilities/perception

D: weak/significantly lower than human capabilities/perception

C: at the level of the average human, may fluctuate from slightly lower to slightly higher

B: strong/significantly higher than human capabilities/perception

A-: very strong/immensely higher than human capabilities/perception

A: very strong/immensely higher than human capabilities/perception, reaching peak stand performance

A+: very strong/ immensely higher than human capabilities/perception, peak stand performance

S: immeasurable/broken limits

Range:

None: can only be used within the confines of the users body

E: 1-3 meters from user

D: 4-7 meters from user

C: 8-15 meters from user

B: 16-49 meters from user

A: 50 meters to close to 1000 miles from user

S: immeasurable/infinite

Potential:

None: full potential of the stand has been unlocked

E: close to unlocking the full potential of stand

D: close to full potential but a decent amount is untapped

C: a decent amount of untapped stand potential

B: a large amount of untapped stand potential

A: an extremely large amount of untapped stand potential

S: infinite potential/impossible to perfect