Stella was designed by Jess Sellars.
It comes in 2 sizes. The small one measures 5mm x 5mm with a 1mm CZ. The large one measures 8mm x 6.5mm and has a 1.5mm CZ.
Threadless decorative end
Small: 1mm, Large: 1.5mm
Small: 5mm x 5mm, Large: 8mm x 6.5mm