The English Channel is 350 miles long. The Channel is bordered by England to the north and by France to the south, and it joins the North Sea to the Atlantic Ocean.
The English Channel's official limits are defined by the International Hydrographic Organization (IHO). The Channel's western limit is a line joining Isle Vierge to Lands End. Its eastern limit is at the southwestern edge of the North Sea, which is defined by a line joining the Walde Lighthouse and Leathercoat Point in England. It is narrowest at the Strait of Dover, where it is 20.6 miles across, while it is 150 miles at its widest.