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Children's feet
Children's feet are smaller than those of adults, not reaching full size until the ages of 13 in girls and 15 in boys. There are correspondingly small sizes of shoes for them. In poor populations and tropical countries, children commonly go barefoot.
==Development==
The development of children’s feet begins in-utero, being mainly derived from basic embryological tissue called mesenchyme. In simple terms, the mesenchyme differentiates to form a cartilage foot template, which is largely complete by the end of the embryonic period (8 weeks after conception). The lower limb buds appear around the 4th embryonic week, slightly later than the upper limb buds, and the developing nervous system is already evident. The blood supply of the foot then begins to infiltrate the tarsal bones, whilst the process of endochondral ossification sees cartilage become bone. Not all of the foot bones are formed at birth. The navicular is the last bone to ossify, occurring between 2 and 5 years of age. The ossification of the cuboid occurs reliably at 37 weeks gestation and its appearance is often used as a marker of foetal maturity. At birth of a ‘full-term’ baby the average foot length is 7.6 centimetres (range 7.1 – 8.7 cm). Foot growth continues to be very rapid in the first 5 years of life; slower development continues until skeletal maturity of the feet, which occurs on average at 13 years in girls and 15 years in boys. Final foot length is achieved before maximum height is reached in both genders.
In Imperial China, it was the custom for respectable women to have their feet bound as children. This was started between the ages of five and seven. The feet were bound tightly and forced into increasingly small shoes so that the front part of the foot was bent back and the toes touched the heel. This was done to make the girls marriageable as the tiny feet and the swaying lotus gait which resulted were considered attractive by Chinese men.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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