The width of the sliding arrow should be the width of the bookmark, with an additional 1/4 inch on either side for structure and another 1/4 inch on one of the sides for the point of the arrow. The arrow is 2 and 1/4 inch wide and 1 inch long. Cut the corners from the side that has the extra 1/4 inch to make the point of the arrow. Refer to the diagram for clarity.
To enable the sliding action of the arrow, mark two horizontal lines on top of each other and half an inch apart. Make them 1/4 inch from the edge that is opposite of the arrow’s point.
Mark the dimensions of the arrow with a graphite pencil.
Do not make any interior cuts until after you customize the bookmark. The page flap and the vertical slits will be cut later.