Why are people’s feet different sizes?

Question: Why are people's feet different sizes?
- Keywords:
  feet,
  people,
  size
Asked by 1drawsome to Cathal, Daphne, Darren, Jon, Katherine on 15 Mar 2012.
- Katherine Haxton answered on 15 Mar 2012:
  
  People are different sizes so their feet are different sizes, it’s just like height and hair colour. Some people have two feet that are different sizes (mine are different by about half a size) which causes problems with shoe shopping. It’s down to genes.

Question: Why are people's feet different sizes?