Enter the height, width, and spine thickness of your book block to calculate the three board pieces (front cover, back cover, and spine) and the covering material needed to wrap them, with the correct turn-in overhang.
Measurements of the pages/text block being bound.
Cut these three rectangles from binder's board.
Single sheet of cloth or paper that wraps all three boards, with a turn-in allowance folded over and glued to the inside on all four outer edges.
Drawn to scale — back board, spine, front board (left to right), with hinge gaps, inside the covering material outline (dashed).