"The Prince" is not a novel. It is a political treatise written by Niccolò Machiavelli in the early 16th century. It's a relatively short work, and its length can vary depending on the edition and translation.
Generally, "The Prince" is around 25-30 pages long in a standard edition.
If you are looking for the length of a specific edition, you can check the book's description online or in a bookstore.