Measure the length of the location where you want to place the brick edge strip, or border.
Measure the width of the bricks. Starting at the place you want the brick border, measure into the lawn to the point 2 inches past the width of the bricks. Mark that location. Tie a string around one nail, and run it along the border to create a straight line.
Remove grass and soil from the place where you will place the brick border, excavating it to the same depth as the thickness of the bricks. Make that ground as level as possible.
Lay the bricks in the excavated area. Position them close together to create a tight fit. As you lay them in place, use a level and a rubber mallet to create a level surface. If you need to cut bricks to size, use a saw with a diamond blade.
Fill in the gaps between the lawn and the brick border with topsoil. Grass will fill in that area, but sprinkle grass seed in the gap area if want grass there quicker.