(A)  Other considerations will be door thickness and your door style/s selection. Interior doors are commonly either 1 3/8” or 1 ¾” thick, while not rendering the 1 3/8” inferior in any way the only difference being the 1 ¾” is a heavier more substantial door and any door over 7/0 (84”) must be 1 ¾” thick to maintain the structural integrity. When choosing a style of door the selection is vast, raised panel, flat panel, arts and crafts, mission or french (glass) are just a few.