Contact Nipple Shields are designed for latch on difficulties. They have a unique cut-out on the shield, to provide more skin-to-skin contact between mother and baby. These thin silicone shields are worn only when breastfeeding the baby, and must not be worn between feedings. They should only be used when recommended to you by a professional.
This Contact Nipple shield is a Newborn Small, which has a 20 mm diameter opening.