I would give a 5 star if these somehow locked or tightened easier once they are on. These are not big earrings, and are perfect for a baby, but ours scratches her head and ears when she is upset and we have already lost 1 pair when the back comes off. 1 pair has been on for a few months at this time, but the other we can't seem to tighten enough that she can't undo it.