Measuring blade length

[Souris]

I have been looking at some of the CRKT M16 knives (thanks to some of you guys) and I am wondering how blade length is measured.

Is it tip to pivot?
Is it tip to the edge of the scales?
Is it tip to the end of the sharpened edge?
Is it from tip to the end of the sharpened edge along the belly of the blade?
Is blade length an industry standard?
Do the same measurements hold true for fixed blades?

I am thinking that I want a blade slightly longer than what I have now in the Tanto blade type. Probably a blade length of ~4".

My EDC is a Ka-Bar Dozier design folder that is ~4" closed and ~7 1/8" long open. It is the first foray that I have had into the Made in Taiwan knives. I have been very pleased with this knife as a no frills working blade. But then again, all of my knives are no frills working blades . And, BTW, A.G. Russell (amazingly enough) has them at a really good price.
http://www.agrussell.com/knives/production/e_through_k/kabar/kabardozier_thumb_notch_folder.html
Mine is item C.

 

[hso]

Call CRKT and ask how they measure blade length. My guess is that they measure from tip to point of contact with the scale/guard.

 

[Valkman]

I measure my blades from the tip to the plunge cut - in other words useable blade only. I never have known how anyone else measures their blades so hso's advice is great.

 

[HiWayMan]

My M16-13Z is 3-1/4" from tip to the plunge cut (ie useable blade). CRKT website says blade length is 3-1/2", which means they measure to the front face of the handle, or the little ears that function as the blade stop.

On most folders that don't specify a blade length the length give is the closed length. Max. length of the master blade is usually 1/2" to 1" less than this. Apparently, on the M16s it is 1-1/4".

 

[hso]

Take OAL and subtract closed length.

 

[HiWayMan]

Take OAL and subtract closed length.

Oh sure...you could do it the easy way, but where is the fun in that?