To order your fireplace facing, make the proper selections in the drop down menus (below.) If the length dimension of the Header needs to be reduced, enter the new dimension as dimension &#039;A&#039;. If the Legs need to be shortened, enter the new Leg Height as dimension &#039;B&#039;. If you need a Riser, make that selection and if it needs to be cut, enter the new dimensions in the boxes for &#039;C&#039; and &#039;D&#039;. And finally, if the Hearth needs to be cut down, make the proper selection and enter new dimensions for &#039;E&#039; an &#039;F&#039;. Note: If you do not supply new dimensions, the facing will ship its original standard size.