I suggest you experiment to see what feels right for you. STart with cheap. Mount them on a piece of 550 cord just long enough to hang over one shoulder and have it sit at belt level on the opposite side. It is easily available, out of the way, the 550 cord moves quietly across your shirt or jacket when you move the binos up to view. Small binos can then be put inside a belt mounted pocket or a jacket pocket to protect them.
The next step will cost no more, the Wensels seem to like this one. Basically the same set up, but much shorter cord, then the binos go over the neck and sit just under the chin, low enough to be out of the way and leave enough to be raised comfortably to view.
The next step will be a full chest harness. I have one and use it sometimes (I tend to use the first scenario). I don't know that there is a ton of difference between the various brands.
Try them all ! Then choose.
ChuckC