The length of a caption for a newborn baby boy or girl can vary depending on personal preference and the platform where it will be shared. Ideally, a caption should be concise and impactful, capturing the essence of the baby’s arrival and the emotions it evokes. It can range from a few words expressing pure joy and love to a longer paragraph that shares heartfelt sentiments and hopes for the child’s future. Ultimately, the length should be determined by what feels most genuine and authentic to the parents.