This is a typical "British style" insignia scheme:
The below presented insignia are worn on an upper sleeve
Lance Corporal
Corporal
Sergeant
Staff Sergeant
Warrant Officer II
Warrant Officer I
The below presented insignia are worn on a shoulder straps
2nd Lieutenant
Lieutenant
Captain
Major
Lieutenant Colonel
Colonel
Below is the insignia used by Officer cadets:
Officer Cadet
Graphics made by HERRWIGGLY - used by permission