These conversions should only be used as guidance. It was compiled as carefully as possible and contains many corrections from experience. Still there can be slight differences; e g. both the French and the Spanish sizes are slightly different than the European size shown below. Also as a general rule for very high heels, order a half size up.
Source: HeelFashion.com - Heel Fashion Magazine - The World of Fashion in Heels Online
http://heelfashion.com/info.php?R=HFC&P=Info&S=SBJ:ShoeSizes