% page sizes for trade paperback
\usepackage[
  paperwidth=5.5in,
  paperheight=8.5in,
  layoutwidth=5.5in,
  layoutheight=8.5in,
  vmargin=0.5in,
  outer=0.5in,
  inner=1in,
  includeheadfoot,
  twoside,
  showcrop
]{geometry}
\ifdefined\SetWatermarkHorCenter
  \SetWatermarkHorCenter{3in}
  \SetWatermarkVerCenter{4.5in}
\fi