Once they reach time of 10-12 a more one must be purchased based upon their evel of skill and competition. Fastpitch Softball Gloves and First Base Mitts are measured by way of top for the index finger of the glove down along the inner of the pocket and out towards heal of this glove. http://Archmageriseswiki.com/index.php/10_Affordable_Baseball_Gloves_That_Don_t_Skimp_On_Quality