Amazon.com: 14K Yellow Gold Plated 6.3mm(H)x5.7mm(W) Flower November CZ Stud Earrings with Screw-back for Children & Women: The World Jewelry Center: Jewelry
$13shop on amazon.com
Found on amazon, lots of different colors and sizes! Just search "screwback earrings" (in jewelry) and then they will all pop up! Starting around $13 (US). 14K gold plated sterling silver. Great buy!