Drawing a realistic baseball field may seem tricky if you're drawing it freehand -- if the lines aren't straight or proportional where they should be, your efforts may not resemble a baseball diamond at all. A straightedge or a square piece of paper ensures the drawing ends up looking like a baseball field instead of an abstract doodle. When drawing the outlines of the sandy areas beyond the bases, a compass comes in handy as well.
Determine how large you'd like each space to be from one base to the next, for instance, 4 inches. Measure that distance from the bottom of one sheet of paper up one side, using a ruler. Make a line at the 4-inch mark along the edge of the paper.
Measure 4 inches from the bottom left edge along the bottom of the paper. Make another pencil mark at this new 4-inch point.
Draw a line connecting the two pencil marks, using the ruler as a straightedge to keep the line straight.
Fold the paper up diagonally along the pencil line, creasing it. Tear or cut the paper away around the folded area with scissors so you're left with a folded triangle. Unfold the paper to reveal a perfect square, or a baseball diamond if positioned with points at the bottom and top.
Place the cutout baseball diamond shape over the second piece of paper in the desired location for the play field. Trace around it to create the baseball field.
Draw small square bases at the first, second and third base positions. If the items are not perfectly square, that is fine, as real baseball bases curve a bit and become misshapen from stepping on them. Draw an upside-down pentagon or house shape at the home plate position, using the first and third base lines as the slopes of the "roof" on the upside-down house shape. This is home plate.
Place the point of a compass at the bottom of the diamond -- home plate position. Position the pencil arm of the compass so it creates an arc a distance away from the bases. When you're happy with the distance, draw the arc from left to right, from the space behind third base to the space behind first base. This step is optional, but it gives the field a more complete look.
Add a small rectangle, if desired, in the center of the diamond as the pitcher's mound, pointing the rectangle so it aligns with first and third bases. If you're unsure where the center is, draw a pencil line from first to third base and from second base to home plate. The intersection is the center.
Draw over your pencil marks with a pen or marker to make them more visible.
If desired, color the area green between the bases, to emulate grass.