Welcome to the board.
It's good to "see" a new "face".
I'm not familiar with "tracking collar" but the fur-saver I use on my dogs measures 23 inches from far side of one ring to the far side of the other. My dogs weigh about 70 lbs. I suppose more than the weight, it's going to depend on the size of the head to slip a fur saver over. If you get one a bit large, you could use a carbiner clip to "shorten" it. (That's if your tracking collar is a "fur-saver" type large chain link collar).
If you are depending on a choke type collar (fur saver included) as a day to day leash, there are hazards associated with that.