Then place the short edge of your ruler against the sturdy object, with the long edge flush against the bottom of your book. With the long edge of your book lined up against your sturdy object, place your ruler down on the flat surface.
This will help to make your measurements more precise by minimising movement. Start with the longest side of your book lined up against your sturdy object. Line your book up against a wall or a sturdy flat object, like another book or a stiff cardboard box. This guide is for measuring a portrait book.
