The design of this tape measure is based on simplicity/purity. The overall center of the product is the starting point, and the ring type is divided to make the product smaller/round visually. In the appearance design, the use experience is fully considered, and the large arc surface, R angle, ring and other elements are used to shape, and the round shape is used to create the visual "lightness" of product users. In terms of the common association of modeling, concentric/symmetrical, create exclusive product features to facilitate product iteration and sustainable development.