Here is a third baby ring for your consideration. It has lovely detail and is less than size 1. It weighs less that 1 gram of 14K gold and has been acid tested to guarantee its fineness.
It has a vacant cartouche which could be inscribed with a name date initials or left empty. These rings have been given over the ages at christenings and baby naming ceremonies. It was a way to provide wealth for the newborn and you can see pictures of babies wearing rings and bracelets in paintings from antiquity.
Now we wouldn't recommend that baby wear this, but rather that is can be a memento of the baby worn by the mother as a charm or pendant. It is in very good estate condition except that it was sized at one time and that repair is apparent.