Question: what is the length of a sheet of us standard (letter size) paper in centimeters?
Answer: The standard for US Letter paper is defined by the American National Standards Institute (ANSI), where-as the dimensions of A4 follow the International Organization for Standardization (ISO) 216 standard. The width and height of US Letter paper are: In millimeters: 215.9mm x 279.4mm. In centimeters: 21.59cm x 27.94cm.