As I posted earlier, the silicone Kit Fox arrived yesterday.
In checking it out, the knot didn't appear to be smaller in diameter than our silicone Ruff Stuff.
The Fox knot is supposed to be 1/4" smaller across, which it is, measured across the two lower high spots.
However the third knot on the Kit Fox is taller than the one on Ruff Stuff.
I wrapped a cloth tape around each of them and the knots measure exactly the same. 6 7/8" in circumference.
So I am a little disappointed that the knot is the same, as I was hoping the wife could take the smaller knot.
Probably won't even try it.
Oh well.
Larry
As I replied to you on the other entry...did you not use enough lube? I honestly can't see why anyone (a woman especially) couldn't take this toy. It's really not that large at all. Most men I know are larger than this and the knot isn't "huge". (compared to some of the other products knots) I guess I'm just a little surprised.
My advice is to practice more with it. If she really can't take the knot...practice. The vagina is a muscle.

It's made to accommodate. Of course, if the issue is about length...if she's really shallow, then maybe she really can't take it because of that, but if the length isn't an issue, I'm sure you could probably practice over time with her to help her use it. Lube, lube, lube.

It's important. As I mentioned before, I find silicone tends to dry the girly bits out so plenty of lube!
But again, my suggestion is to keep trying but it's up to you two and what SHE is comfortable with.
Just thought I'd try to help.