Re: How do you know if the flanges are too small?
If the nipple rubs painfully against the sides of the collection tube, the shield is probably too small.
If the nipple shoots in and out of the tube and you feel frequent breaks in the suction, then the shield is probably too big.
If neither of those things are happening, the shield is probably about right.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"