Dating some Barbie dolls made in 2009 and 2010 will be easy. Three special-edition Barbies with thinner ankles will be sold starting in December. They and their fashions and shoes are being created by designer Christian Louboutin. He said Barbie's ankles had to be thinner so high-style modern shoes will stay on her feet. The dolls will cost $150 each and will come with four pairs of Louboutin shoes.