At the most basic level, the commissioned officer ranks of the Air Force, from lowest to highest, are Lieutenant, Captain, Major, Colonel and General. There are no warrant officers in the Air Force.
The full list of Air Force commissioned officer ranks are as follows, ranked from lowest to highest with their corresponding insignias: Second Lieutenant (one gold bar), First Lieutenant (one silver bar), Captain (two silver bars), Major (gold leaf), Lieutenant Colonel (silver leaf), Colonel (eagle), Brigadier General (one star), Major General (two stars), Lieutenant General (three stars), General (four stars), and General of the Air Force (five stars). The General of the Air Force is reserved for wartime only; the current Air Force Chief of Staff is a four-star General.
The enlisted officer ranks of the air force are as follows, ranked from lowest to highest with the number of stripes on their corresponding chevron insignias: Airman (one), Airman First Class (two), Senior Airman (three), Staff Sergeant (four), Technical Sergeant (five). At this level there begin to be some equivalent ranks: Master Sergeant and First Sergeant (six); Senior Master Sergeant and First Sergeant (seven); Chief Master Sergeant, First Sergeant, and Command Chief Master Sergeant (eight); and Chief Master Sergeant of the Air Force (nine), the highest enlisted rank.