The search results provide shoe size charts for different countries and regions. A size 39 is a mens shoe size in the European Union, according to the shoe size chart from GrivetOutdoors.com. It is also listed as a womens shoe size in the Saucony size chart. However, it is important to note that shoe sizes can vary between brands and styles, so it is always best to refer to the specific brands size chart for the most accurate sizing information.