Lansinoh contact nipples are an effective aid for mothers who have difficulties breastfeeding. Nipple shields protect sore nipples during healing and assist with issues related to feeding premature, very small, or sick babies, flat or inverted nipples, and excessive milk flow. They are extremely thin, soft, and flexible, made from 100% silicone. They are free from BPA and BPS. The special nipple design maximizes the contact between mother and baby during breastfeeding, allowing the baby to feel the mother's skin and smell her scent. The nipples come with a protective cover for hygiene and comfort. 24mm flanges are also available. We recommend that all mothers consult a doctor or breastfeeding expert before and during the use of nipple shields. The nipples are designed to address short-term breastfeeding issues until the underlying problem is resolved. Size: 20 mm.