Security Height Rule &ndash; Fractional &ndash; 3 Foot 8 Inch to 6 Foot 8 Inch &ndash; White Reads from 3 Foot 8 Inch to 6 Foot 8 Inch, a range that captures most common adult heights Dimensions are 1 7/8 Inch wide by 37 Inch long Dual edge, thick 1/2 Inch increments are readable from a great distance High-tack adhesive sticks to nearly any clean surface Bold black graphics on a white background