I just made a pair for a baby who is 2 months old. I used a tiny
round trim piece from Stuller that takes a 1 pointer, and looks like
bead setting with a milgrain edge. It's smooth - no prongs. I
soldered a bar across the back for the posts. For the ear findings, I
used my favorite ones, the Guardian posts and backs. La Pousette is
amost the same. They have the flat ear nuts that you must squeeze to
take off. The posts come with 2 notches. I cut the first one off, and
file down the second so it barely protrudes out of the nut. I don't
make it as pointy like it's supposed to be, but a little rounded so
it's much more comfortable. What you want is a shape that will allow
the ear nut to snap onto it easily, but not so pointed that it feels
sharp when the nut is on the post. That way, the earring will be
comfy when the baby is sleeping on it. Use a little oil on the nut
for lubrication. When it's super clean, it won't snap on easily.
I do this to all the Guardian earrings for adults, too. The outer
notch is too long for most people, and the second one, although it
looks too short, is just right. Since the nut is shorter than regular
friction nuts, the post can be shorter, too. The distance between the
earring front and the nut is what matters.
These ear nuts must be cleaned every so often, because they have
moving parts inside that will get full of dirt after a while. I had
one customer who wore hers for years without taking them off, and
they were so full of gunk, that I had to use pliers to squeeze the
tabs on the ear nuts to remove them.
I made these out of 14K white gold because the customer insisted on
white gold. I explained that some people are allergic to the nickel
in white gold, and to watch the baby's ears for an allergic
reaction. I also heavily rhodium plated them.