The tiara-like crown that Elsa wears is beautiful and elegant, matching Elsa herself. Disney’s replica (seen [here]) is not that far off in general structure, thought the jewel embellishments are somewhat different. Elsa wears a blue gem in the center of her crown in the movie.
Mattel’s golden design, as seen on its Elsa coronation-outfit doll, is even closer to that of the film, though it lacks the blue gem in the center. Mattel also adds a blue variant on the crown, on its doll showing Elsa in Snow Queen attire. This blue crown is apparently also available full size.