Starting from chapter 12, I will change how statistics are measured, and they will be as follows:
From F- to F+: These are the stats of normal humans.
From E- to E+: These are the stats of Genin or Low-Class.
From D- to D+: These are the stats of Chunin or Mid-Class.
From C- to C+: These are the stats of Jounin or High-Class.
From B- to B+: These are the stats of Special Jounin or Supreme-Class (like Asuma or Kurenai).
From A- to A+: These are the stats of Hokage or maximum class(like Kakashi after the 4th war or Hiruzen).
From S- to S+: These are the stats of Legend or Demon King (like Serafall or Grayfia).
From SS- to SS+: These are the stats of Transcendental or Super Demon (like Sirzechs Lucifer or Ajuka).
From SSS- to SSS+: These are planetary level (like Ten-Tails Madara, with Kaguya at the top alongside Great Red and Trihexa).
From SSSS- to SSSS+: These are star level.
From Ex- to Ex+: These are solar sistem level.
From Exx - to Exx+: These are galaxy level.
From U- to U+: These are universe level.
From V- to V+: These are multivese level.
From Z- to Z+: These are omniverse level.
From Ω: These are absolute power.