Center point / Convenient Shoelace

The image of a tidy shoes are clean. If their laces are not tide up, however, it will be seen as tidy. When people tie up their shoelaces, they just do it with their feeling or they estimate the length by eye measurement, and sometimes it becomes mismatched laces. To solve this incontinence, I put a centre-line on the shoe laces so you can see where the shoe laces' centre are and you will not need to measure it by your eyes.