On Tue, 18 Feb 2014 09:48:17 +0000 (UTC), Judy Miller
wrote:

It always seems I have the wrong diameter headphone jack when I need one.

Since adapters exist, why do they make headphone jacks different
diameters anyway?

Is there a functional difference?

Some say "size does matter" and this is an excellent example of that.
You need to be more careful of what you try to stick in your holes.