Why the shoe should be placed around the door

Shoe ark shoulds not be too high too big: the height of the shoe should not be more than height, head of the household, if more than this dimension was wrong.The area of the shoe should be small not big, should be short should not be high.Shoe ark in the appropriate side unfavorable: although practical, but it is difficult to appeal to the hall, so in addition to the above mentioned points, also note in the appropriate side unfavorable, ideally on left and right sides, namely shoe should not be placed in the middle of, move it to some of the best, leave the center focus position.