Breviary Pouch - boxed zippered pouch
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BOOK
  height (spine)         7.3 in
  width (cover)          4.75 in
  depth (thickness)      3 in

EASE ADDED
  around the length      3/16 in
  at the opening         1/2 in
  around the thickness   1/4 in

FINISHED POUCH, INSIDE
  width                  7 1/2 in
  height                 5 1/4 in
  depth                  3 1/4 in

CUT LIST
  seam allowance         1/2 in on every seam
  panel                  11 3/4 in wide x 7 7/8 in tall
                           cut 2 from outer fabric
                           cut 2 from lining fabric
                           grain runs parallel to the height
  corner squares         2 1/8 in square, one at each bottom corner
                           (8 squares total, 2 per panel)
  turning gap            4 1/2 in, centred on the bottom edge
                           of ONE lining panel only

NOTIONS
  zipper                 14 in nylon coil, size #4.5 or #5
                           panel is 11 3/4 in wide, so the zipper
                           overhangs by 1 1/8 in at each end
  thread                 all-purpose polyester, 1 spool

FABRIC TO BUY (58 in wide, prewashed allowance included)
  outer, 10 oz duck      0.50 yd
  lining, quilting cotton 0.50 yd

ARITHMETIC CHECK
  D   = 2*S - 2*SA        = 2*2.125 - 2*0.5 = 3.25
  W_f = W_cut - 2*SA - D  = 11.75 - 1 - 3.25 = 7.5
  H_f = H_cut - 2*SA - D/2 = 7.875 - 1 - 1.625 = 5.25
  bottom seam W_cut-2*SA  = 10.75, and W_f + D = 10.75
  note: turning gap clears each corner square by 1 1/2 in on the bottom seam