The Ludlow Foundries 76mm numeral is face fix and finished in a Ludlow Black Antique finish. Available in numbers from 0 - 9 it is the ideal cottage front door number. 76mm High Characters The optimum size for front door numbers is 76mm, it is an adequate size to be seen from a distance, yet does not dominate the door.  Alternative sizes in common use are 60mm and 100mm, which in the appropriate circumstances are ideal sizes.  Terraced house fronting directly on to the street would possibly use a 60mm number and front doors some distance away from the road would possibly ...