Bought these for my five year old grandaughter.  She normally wears a size 10.5 or 11 but read these ran large.  The size ten was perfect.  She normally won't wear a thong type shoe as the post bothers her but she has never complained about these.  I only gave them a four star as some of the crystals tend to fall off.  Even so, the shoes still look good as the shoes have the fuschia color under the lost crystal.  She loves them.  I went back and got a second pair in silver.