This is a new ear hat from the Cars Land Grand Opening at California Adventure Park in 2012.  It has never been worn or displayed.  It has been stored with a stack of ear hats along with many other items I have stored in my Disney collection.  The tag says "one size" but I think it is more of a child's size than an adult size.  I compared it to another ear hat that was labeled "adult" and the Cars Land hat did have a slightly smaller circumference.  I must sell most of my collection, so here is an opportunity for the right Disney fan to grab a little piece of park history.  Please message me with any questions.  Thank you.