Next comes the part where the scissor must go into action. You need to be very sure that you are happy with the hemline that you've got, as there is no turning back later, once you have cut it. If you are sure, then using a ruler, mark the cutting line for the excess of pant fabric, leaving a margin of about 2 inches for hemming. Cut and trim the excess fabric. Again, iron the pants on the new hemming line.