There are two important requirements for sewing on buttons - to put in sufficient thread, and to fasten this thread securely that it may not loosen from the end. In sewing flat buttons on coats, jackets, etc., place a small button on the under side and sew through it to avoid having the stitches show on the under side.
a. The Loop or Shank Button-Place the button in position with the loop at right angles to the edge of the cloth. Hold the button with the left hand and overhand the loop to the cloth. Pass the thread to the under side and fasten.
b. Four-hole Button - In sewing on flat buttons insert the needle from the right side and back in order to hide the knot under the button. Place the button in position and hold a pin across the button for the purpose of lengthening the stitches. Put in five or six stitches diagonally across the button and over the pin. Change the position of the pin and repeat. Slip the pin out, pass the needle through the cloth only, and wind the thread around the threads between the button and the cloth. Pass the needle through the cloth and fasten securely.
c. Two-hole Button - Place the button so that the stitches will come at right angles to the edge of the cloth, with the pin across the button. Proceed as with the four-hole button.