These are translucent light green prehnite cushion gemstone cabochons with sterling silver. Not sure what size you need? The pink eraser on the end of a pencil is 7mm. Pop one off and hold it to your ear. 8mm would be just slightly bigger, 6mm just slightly smaller and so on.
Price: $28.00
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Amazon.com: 8mm Cushion Green Prehnite Gemstones and Sterling Silver Post Earrings: Handmade
8mm Cushion Green Prehnite Gemstones and Sterling Silver Post Earrings
Handmade Products Jewelry Earrings Stud