France doesn't have an official nickname, but it is sometimes referred to as "the hexagon." The nickname is a direct reference to the shape of the country, which is hexagonal.
A hexagon is a six-sided shape. France's six sides are defined by its borders. One side of the hexagonal shape is formed by France's border with Belgium and Luxembourg. The next side is borders Germany, Switzerland and Italy. Another side is bordered by the Mediterranean Sea, while another borders Spain. The Bay of Biscay forms the border of another side, and the English Channel borders the sixth side, separating France from England.