EU Size 40 is a standard shoe size used in the European Union. It typically corresponds to a foot length of approximately 25.5 centimeters or 10 inches. This size is commonly found in various types of footwear, including sneakers, boots, and dress shoes. In the EU sizing system, sizes are usually measured in whole and half sizes, with Size 40 being a popular choice for adults. It is important to note that shoe sizes can vary slightly between different brands and styles, so trying on shoes is recommended for the best fit.