I bought this hat to go with my Riddler costume.  It was a little more expensive than the REALLY cheap hats, so I figured that would make it better, right?
WRONG.
My head is rather large... I'll admit that.  I wear somewhere between a large and an extra large.
HOWEVER, my wife does not have a large head, and this thing won't even fit her.

It is really, really tiny.  Maybe it is mistakenly marked as an adult product but it would be better for someone between the ages of 12-15, I'd imagine.

So, if you have a really, really small adult head, this might work for you.  It arrived in an acceptable condition, although the ribbon was undone.

But if your head is anywhere in the normal to large range, STAY AWAY!  You will be wasting your money, as I have.