Paper comes in standardized formats or sizes. The 11 x 17 page, as it’s commonly called, belongs in the large size category. Measured in inches, this size is most frequently used by designers, engineers, and architects.
The large size is perfect for printing maps and diagrams with a lot of details and labels, which may not fit on a letter or A4 size paper. The 11 x 17 paper is also called tabloid or ledger size, as these two types of publications were of 11 x 17 inches.