To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I have a big head and this thing sat on top with a significant amount of space to spare. If I had this sit flush it would sit below my eardrums. Quality doesn't seem to be all that great, very foamy and cheap.