These tiny Swarovski birthstone charms are same style as the CC6S 6mm channel charm you have been buying except these are smaller in size. This picture should give you a better idea how small it is.
These are made with 4mm Swarovski stones 17SS size. This size stone is about 1.9 mm thick. The round part of the charm is about 4.6 mm in diameter including the sterling silver plated bezel. The height including the loop is about 6.6 mm. Internal diameter of the loop hole is 0.8 mm approximately. A 22 gauge wire jump ring should fit nicely through the hole. The bezel is high quality 100 mil sterling silver plated and these are anti-tarnish.
We sell these in 10 pc units just like CC6S's. We carry these only in 12 birthstone colors at this point.