If the foot length is 14 cm, Nike should wear 8C. The actual inner length of the shoes corresponding to 8C is 15 cm, suitable for children with feet 14-14.5 cm long.

Extended information:

Shoes Size, also called shoe size, is commonly marked in the following ways: international, European, American and British. International standard shoe sizes are expressed in millimeters of foot length. Chinese standards use millimeters or centimeters as units to measure shoe size. For example: 123 represents the unit of millimeters, while 12.3 represents the unit of centimeters. In fact, the two refer to the same.