Each level has 3 stages: lower, middle, upper, and top/elite:
Academy Level
Genin Level
Chunin Level
Special Jonin Level
Jonin Level
Elite Jonin Level
Kage Level
Super Kage Level
...
Chakra Levels: (Note: Chakra does not always equal true strength!!!)
Academy Level -> 10 - 39
Genin Level -> 40 - 99
Chunin Level -> 101 - 499
Special Jonin Level -> 500 - 1,999
Jonin Level -> 2,000 - 9,999
Elite Jonin Level -> 10,000 - 99,999
Kage Level -> 100,000 - 999,999
Super Kage Level -> 1 Million - 9.99 Million
...
Skill Levels: (Higher Skills = Higher Chakra Control Indirectly = Less Chakra Used For the Same Justu)
Entry - You've learned it. Long hand seals, low efficiency.
Proficient - Can be used in battle; Proficient; Stable Execution
Mastery - practical in battle, limited strategic use
Small Achievement - Faster hand seals, medium-level strategic use
Great Achievement - High-level execution, creative usage, few flaws
Perfection - Understood Fundamentals; no wasted motion; no hand seals
Artistic Conception - Merged Will/Path with skill; transcends the ordinary
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Justu Levels:
E-Level (3 Basic Academy Jutsus)
D-Level
C-Level
B-Level
A-Level
S-Level
...