Here are 4 nicely matched Leading Aircraftman rank badges of the post war Royal Canadian Air Force (blue) and the Royal Canadian Air Cadets (green backing).  The cadet patches were worn on their green belted uniforms.  The RCAF lac badges were worn on the upper sleeve.  Each is 3 1/8" wide. 

Good luck bidding and thanks for looking at another auction from The Mighty Atom.