Package: Mimos® Cushion with Clouds CoverBrand: MIMOS Features: Certified medical device (CE Class I). Clinically proven efficacy in preventing and correcting plagiocephaly. Size M Head circumference between 42 and 49 cm. NOTE: If your baby is more than 4 months old and a cranial perimeter of 41 cm, then the cervical area is more developed and you can opt for an M, although it will also be within the size S usage range. Recommended to prevent and correct positional cranial asymmetries. 100%