I believe you mentioned earlier that you didn't have a good mental image of this knife? I suggest you do an image search on Ka-Bar USMC knife. I've seen one in person at a military surplus store, so I have a very good sense of scale.
We're going to assume that a standard full sized Ka-Bar USMC knife is what was in the full sized Ka-Bar USMC sheath.
The blade is 7 inches long. The total length of the knife, including handle, is nearly 12 inches long. Grab a standard 12" ruler and hold it to your belt area to see how far it goes down your leg.
This is not a subtle knife. It's not going to fit in a pocket. It's very noticeable. If you walk into a drug deal with it strapped to your belt, they are going to assume hostility and things are going to proceed very badly--if you even got let in wearing it in the first place. And it's not a knife that you are going to just take off your belt, put it down, and zonk out around other people.
In the woods, you might not get a second glance for wearing it. In an urban environment--you are going to be noticed and it's going to be taken as a threat.
To try to get an image of what this knife could do, I poked around YT and found there is a "water bottle test" that is popular for testing Ka-bars.
So here's a video of USMC Ka-Bar 7" blade knife cutting through 10+ filled plastic water bottles that are lined up--with one swing of the arm.