This bejeweled blue rhinestone heart crown measures approximately 2.5 in diameter (inner).  It is approximately 1.75 in high at its tallest points.  It is just what is needed to add an air of authenticity to your royal highness.  

For the crown not to slip, move it around until the inner metal circles lodge properly.  This Barbie doll in the first photo had an approximately 18 cm circumference head.

Buy two and you get 10 percent off.  If you want one of the red and gold heart crowns and one silver with blue hearts, let me know and you will get both colors instead of just all one color.