Dollar coins have never been very popular in the United States since the removal of specie coins from circulation. Despite efforts by the government to promote their use, such as the Presidential $1 Coin Program, most Americans currently use the one-dollar bill rather than dollar coins.
Width and Height. An interior passage door is any door that you use to move from one room to another, and the code requires these to be 80 inches in height. Because this corresponds to 6 feet 8 inches, door manufacturers refer to this as a 6/8 door.
Standard Inside Door Sizes. The most common width for interior doors is 32 inches. The International Residential Code does not require interior doors to be as large as the main entry door in a house, but it still sets minimum height and width requirements. Thus, most standard interior doors are the same height, and come in widths ranging from 28 to 32 inches.