The first, for the size, the European size is much smaller. If you usually wear Chinese size 42 yards, the relative CM number is about 26CM, but the Euro size 42 is biger, about 27-29CM. Our shoes use the international standard size, which is the length of the foot (in centimeters) for the shoe size.
The second, men's shoes and women's shoes are also different, such as the same Chinese size 25 cm women's shoes corresponding to the European size 40, men's shoes corresponding to the European size is 40.5. The Chinese size centimeters are male shoes 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, and the corresponding European sizes are 40, 40.5, 41, 42, 42.5, 43, 44, 45 respectively.