Below are some helpful tips to set up age appropriate fields as well as useful items for game day needs. Lining the Field - 6:26 mark to see how to trace a pitching circle Field Dimensions - 10U Field Dimensions - 12U Field Dimensions - 18U Setting a Perfect Pitcher Mound Lineup Cards - 2 Lineup Cards - 4 9 Fielders & Positions by Inning 10 Fielders & Positions by Inning