R Pin

grabcad

The human eye registers minute objects as mere 0.0394 inches across, but a 1-millimeter thickness is something people generally grasp better, at about the size of a single grain of sugar or a small paper clip. This dimension sparks widespread recognition in everyday conversations. Human sight alone typically doesn't let one distinguish the tiny differences in 0.001-inch measurements and this subtlety gets overshadowed quickly, while human understanding is better grounded by objects around the size range of about half to three-quarters the thickness of an ordinary credit card, thus making our mental image more concrete as well as giving it an immediate meaning or a basis of comparison that people generally use to estimate.