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.
Its huge! I am a grown adult and it falls off my head. I bought for my tween niece but it's not adjustable at all! The quality is good but unless you have a melon on your shoulders, this isn't going to work.