Jayrfred,
This fly is 5.5" but can be extended by adding tube flies in line ahead of it:
http://www.trollingflies.com/tandem-arctic-fox-trolling-flies
The Salmon Series Tube Flies are a west coast salt water pattern that are close to 6".
http://www.trollingflies.com/salmonseries
Contact me for more details.
Dragginflies