4-year-old children's feet are usually how long?

Patient's question:

The child has been crying non-stop recently and isn't eating much. How long are the feet of a 4-year-old child typically?

Doctor's answer:

Height under normal circumstances is 15cm-17cm, the current standard
At the age of four: 98.7~107.2 cm, weighing 14.8~18.7 kg
At the age of four and a half: 102.1~111.0 cm, weighing 15.7~19.9 kg
At the age of five: 105.3~114.5 cm, weighing 16.6~21.1 kg