Letter Paper Size, Dimensions and Format (US series)
Letter in millimetres
|Area (A)||60,264 mm²|
|Perimeter (P)||990 mm|
|Diagonal (d)||352.84 mm|
The Letter format measures 216 x 279 mm or inches. An Letter paper fromat has an aspect ratio of 1:1.29. The Area of the Letter paper size is 60,264 mm² or 93.50 in² with a perimeter of 990 mm or 39 in. An Letter format has a diagonal length of 352.84 mm or 13.90 in. The Letter size belongs to the US series. In the US series there are a total of 8 paper sizes.
There are a total of 8 US Paper Sizes.