Clothing sizes are not the same all over the world. If you wear a size 8 in the United States, you will wear a different size for clothes made and sold in other countries. Learn to convert to European sizes, but as with all clothes, the sizes differ by the brand, and it is best to try on the clothes before making a purchase to ensure the best fit. Keep in mind that sizes often labelled as "European" are used mostly in Germany and Scandinavia. Italy, France and the UK use completely different sizes.
Subtract 30 from the European size to get the U.S. size. For instance, if the European size is 38, the U.S. size is 8.
Subtract 28 from the European size to get the UK size. You can also get this by adding 2 to the U.S. size. A European 38 is a 10 in the UK.
Add 2 to the European size to calculate the French size. In the example of the European size 38, it would be a 40 in France.
Add 6 to get the Italian size from the European size. A 38 in Germany is the same as a 44 in Italy.