These antique silver connectors are great with Swarovski 8mm chatons (SS39).  The price is for two connector pieces.  Just glue in your favourite colour to create a bit of sparkle.  
They are approximately 17 x 10mm in size 
If you would like to add a Swarovski 8mm chaton they can be found here
https://www.etsy.com/uk/listing/826916292/swarovski-elements-ss39-8mm-chatons?ref=listing_published_alert