1/12 scale eye blanks (Though you can easily scale them up or down in your slicing software for ANY size eyes!)
I made these for my SOOM Meipy custom, which needed smaller irises than usual to complete my custom Sorrow BJD from Klonoa 2.

The black pupil part is about the size of a 0.5 or 0.7 pencil lead if printed at the intended 10mm size.