To many skateboarders the length of a skateboard deck is an important metric. It is important but it is also imprecise. The main issue is that if you take a tape measure and stretch across the top of the deck it is almost impossible to measure it consistently. Do you press the tape against the surface of the deck? Is there a gap between the bends? Or do you measure straight across no bend from the end of the nose to the end of the tail? All of these ways leave much to be desired and don’t really give you much useful info.