When the final trim size of a Demand bound book is smaller than the paper on which it is printed (e.g., a 6"x 9" book printed on 8 1/2"x 11" paper), pre-trimming charges can be avoided by placing the text so that only the top, bottom and front edge of the text block require trimming. If possible you want to center the text top to bottom, so that we can trim off the same amount off both the top and bottom of the sheet. Add 1/16 inch to your inside margin (we mill off 1/16 inch on the binding side). The outside trim should equal the width of the printed page minus the final trim width minus the 1/16 inch we mill off the binding edge or inside edge. For example for the 6 x 9 inch final trim we will trim 1 inch off both the bottom and the top and trim off 2 7/16 inches (8 1/2 minus 6 minus 1/16) from the outside.

Here is a downloadable pdf version.