This pertains to length. It is the measured distance between two points. This could refer to such things as the height of a wall, the length of a strip of wallpaper, or the length of a piece of border. Linear feet is the measurement required for borders.
A measurement for descriptive and control purposes of shelf space occupied by documents. For vertical files, the total length of drawers, shelves, or other equipment occupied is calculated; in material filed horizontally, the total vertical thickness is used. A measurement for descriptive and control purposes of the length of film, tape, or microfilm. Top of the page