Fanno changed the way they measure the blade in 2013 to measure the cutting edge only. The 14" blade is what used to be called the 15", and the 15" blade is what used to be called the 17" extra-thick. Same blades, different measurements!
Fanno saw blades are dependable, fast-cutting blades, many of which utilize Tri-Edge technology. The 13”blade is standard for hand saws and pole saws, and is available with a hooked tip for pole saws. The 15” blade has gullets space along it's length to prevent material from binding in the cut.