The difference between a size 44 shoe and a size 43 shoe is 0.5cm.
Size 44 refers to the European size, the Chinese shoe size corresponds to 27cm, and size 43 corresponds to 26.5cm. The Chinese shoe size is recorded in centimeters, which refers to the length of the foot (the length from the heel to the toe). That's the inside length of the shoe.
For example, 123 indicates that the unit is millimeter, while 12.3 indicates that the unit is centimeter, in fact, the two refer to the same.
A difference of 0.5 cm.
Size 44 shoes plus ten divided by two, is equal to 27 centimeters, so the inside length of the shoe is 27 centimeters, the inside length of the size of 43 is 26.5 centimeters, the shoe size difference of one yard, the inside length difference of 0.5 centimeters.