After the "Can I legally carry it?" question is answered, carry the largest folder you possibly can. I carry the Tatanka almost every single day. Sometimes, I carry The CS Rajah II or XL Espada.
Here is how to think - Lets say you are at the mall. An Islamic terrorist is stabbing and beheading people. All you have is your knife you carry every day. A lot of thoughts would be going through your head. "Gee I wish I had a smaller knife" would not be one of those thoughts.
Knife size cannot take the place of skill and training. Small knives in the hands of trained people can be very effective. Those same people would even be more effective with a bigger knife. Bigger knives cut and penetrate deeper.
P.S. By the way, my hypothetical story is a very real possibility with the traitors we have running this country. They are importing them by the thousands.
No offense dude, but if someone is stabbing people to death, the last thing you want to do is get into a knife fight. That's what guns are for.
Knife fights are brutal, and rarely have winners, if ever. Bigger knives cut and penetrate deeper, sure, but when you're attacking with a knife you're not supposed to be stabbing just anywhere. You're targeting key points, the throat, abdominal region and limbs. You're using jabs and slashes.
Knives are a good counter to getting jumped, but they aren't a good counter to other knives, and they aren't a good counter to guns unless you're Seal Team 6 and dispatching a watch tower guard.