I can just say, top class! I had sore and cracked nipples on one side almost since the beginning of lactation. After several attempts with nipple ointment and compresses me these nipple shields were recommended. Immediately the first use I noticed how my nipple was spared. My daughter drank also wonderful, as if I would not turn the nipple shields. We now use it for 1 week and my nipple is healed, but I'll never run out of breast-feeding.
I can only recommend this Brusthütchen every woman! With regard to the size best a doctor or a lactation consultant contact.