For EDC in the city, Houston, I really feel obligated to follow the 5.5" limit for non-outdoors activity carry. Even then I rarely carry a fixed bladed knife as if I ever was arrested I just do not want to have to explain by I am carrying a large fixed knife. Even an s5 is going to look huge to many people around here. The connotation of large can vary greatly with what judge, jury, and police officers you deal with.

Its funny that I think people would be more accepting of someone accidentally hopefully, revealing their CCW pistol then wearing a fixed blade of any length greater than 3.5" or so.