I've seen some 18 Gold players using 10.5 inch gloves. Any more adjustments would possibly be developed by whoever fixed it. The rule book insinuates the strike zone is from across the shoulders to the knees in relation to vertical measurements and must cross the dish for the width of this zone. http://Archmageriseswiki.com/index.php/10_Affordable_Baseball_Gloves_That_Don_t_Skimp_On_Quality