Product review (2 stars): This product may not fit your fan - NOT ENOUGH INFORMATION
Agree with others.
The product may be 5 star, but it may not fit your fan.
  The LENGTH of the BLADE is irrelevant.
The placement of the screw holes on the blade is the important thing.
Go to EBay, and there you will find many blade arms - Many they have the blade hole measurements listed, from there you can find what you need.