Khrysos - Princess cut. 2.5mm.

Show off your unique look with a dazzling sparkle! Crafted with the highest quality ASTM F-136 titanium and premium zirconia that is made to shine, you can customize it to your style with three sizes and nine color options. Make a statement with this sophisticated prong-set square-cut premium zirconia threadless end.

Threadless post is 25G. Fits all major brands of threadless jewelry.