It is necessary to measure the base of the nipple with the help of a ruler before purchasing.
Size XXL has a size of 36 mm and is suitable for mothers with a nipple base diameter of up to 32 mm (this does not include the areola).
When suckling, the nipple should move freely without colliding with the walls of the tunnel.
Note: If the nipple rubs against the tunnel walls, it means that the funnel is too small, or if a piece of the areola enters the tunnel, it means that the funnel is too large.
It is normal for each nipple to be a different size from the other, or for them to vary in size during the breastfeeding period.