Do not waste your money!  I bought this mask for my four year old, knowing his head size was slightly above average.  Description stated fits ages 6-12.  When I tried it on him, took me several minutes to even work it onto his head and pull it down properly.  Has zero stretch to it!  It was obvious within seconds of getting it on it wasn't going to work, and my son tried to pull it off himself, but couldnt.  It took me another several minutes to work it off his head, resulting in tears.  I couldn't even imagine trying to put this on a twelve year old!  Buyer beware!