CHAMPRO Youth Quarterback Playbook - Triple Quick access to plays Velcro strap keeps it closed during play Great for use at all levels of play Adult  6.75 (L) x 4.25 (W) ages 14+; Window size: 5" (L) x 3" (W) Youth  5.25 (L) x 3.65 (W) ages 12-14; Window size: 3.5" (L) x 2.75" (W)