To provide customers with more choices for customization, Chunghwa Post has issued “Sustainability.” This set of personal greeting stamps, each valued at NT$6, features six stamps in a se-tenant block. These personalized stamps are suitable for both collecting and using as postage.The stamps are designed around the six concepts of sustainability—environmental protection, integrity, heritage, innovation, shared use and public welfare. With geometric shapes and vivid colors, the stamps are applicable for both individual and corporations to convey the essence of sustainability and social inclusion.The non-personalized stamps that are available in post office branches are printed in 36 stamps per sheet. For overprinting purposes on the personalized stamps, three formats are issued. The designs follow: 1. Horizontal-sheet layout without marginal inscription: The 4 stamps are printed at right side. 2.Vertical-sheet layout without marginal inscription: The 12 stamps are printed at both upper and lower sides. The name of the stamp of the above-mentioned two items is printed at upper margin. More spaces are reserved for the customers’ own design.3. One business card layout without marginal inscription: The sheet is comprised of six stamps. The name of the stamp is printed in the middle right margin. Each sheet (A4 size) can be cut into six smaller sheets (96 mm × 95 mm). To offer better service for customers purchased in bulk, those who purchase over 5,000 sheets of business card layout or over 10,000 sheets of horizontal and vertical layouts may choose stamps designs at their own discretion.