These tiny operculum measure from 1/8" to 1/4". Each pack contains 50 of them. I always add a couple extra in case there is one you don't like.
They are from a sundial, (heliacus variegatus).
They are very unusual. They would make great flower centers, a pattern or a border.
I got these from the Philippines some time ago. I don't know if I will ever be able to get more when these are gone.