Ever heard of a measuring tape?
A word of advice: the easiest way to measure the middle between two objects is to take a measuring device and split the distance by two. We’re not quite sure what went wrong here. Did they start off measuring in inches, then switched to centimeters?
Did they want it to look this way? If it were a part of an abstract art exhibit in a museum or a gallery, it would be completely understandable. Judging by the type of this art, it’s not.