The Warrior Burn Jr helmet was developed specfically for the youth lacrosse player under the age of 12. It has a energy absorbing Vinyl Nitrate foam liner for protection. The quick and easy velcro pull-tab adjustment system allows the helmet to securely fit on a developing player. It also has an expanded Polypropylene (EPP) liner for impact protection. This helmet meets or exceeds all NOCSAE standards and is SEI certified. This helmet fits youth players that have a head circumference of 19 3/8 - 20 9/16 inches. The hat size would be a 6 - 6 1/2. The circumference of the players head should be between 47 -53 CM.