Abstract: A hand-held measuring device shaped like home plate holds a reel of line having color coded markings representing distances related to the dimensions of a variety of different sizes of baseball or softball diamonds. An end ring at the end of the line and an anchoring ring at the back of the housing can be staked to the ground. The device allows for a single person to create a competition or practice field with the proper dimensions of a baseball or softball diamond for various sizes of professional or amateur fields.