The size of A2 paper is 420 x 594 millimeters or 42 x 59.4 centimeters. In inches, it measures approximately 16.5 by 23.4 inches. This size is commonly used for calendars, posters, and larger format printing. A2 is half the size of A1 and twice the size of A3. Its surface area is about 0.25 square meters or 2,500 square centimeters.
