Your nipples contain the ending of the milk ducts that release milk when breast-feeding. Their colour can range from pale pink to dark brown and may have a few hairs attached to them. Nipples and their surroundings can vary from being the size of a 10p piece up to the size of a CD. Nipples may stick out, be flat or even inverted where the centre of the nipple sticks inwards - all perfectly normal. They will tend to point slightly outwards, which is perfectly normal, because when women feed babies, it means that the nipple is more accessible to the baby when the baby is being held in the crook of the arm. If a sticking out nipple suddenly comes inverted from one day to the next (so to speak) then you should see a doctor about it.