Solitaire earring are available in the classic circlet or the petite circlet.  They are made of sterling silver, patina sterling silver or 18k gold.  You can also purchase the circlet earrings in a vertical position (show in horizontal) and prices listed are for vertical or horizontal views. 

Classic circlet measures 33.4mm in diameter and changes from 3-1.0mm in thickness.
Petite circlet measures 26.5mm in diameter and changes from 2.10-1.10mm in thickness.