These pendant settings work well with 8mm Swarovski chatons (SS39) just glue in your favourite colour to make a sparkly necklace or use 2 for earrings. Size is approximately 13 x 10mm and price is for 2 pieces 
Our 8mm Swarovski chatons can be found here
https://www.etsy.com/uk/listing/826916292/swarovski-elements-ss39-8mm-chatons?ref=listing_published_alert