Sizeï¼š28*18cm/11*7" Age Reference: From birth to 3 months, can be used for up to 1 year old. The pillowcase is made from high quality cellulose and cotton that does not cause skin allergies. It's very important for a newborn to use a anti-roll pillow. It helps baby's bone development after 3 months. Soft and gentle on baby's skin, comfortably padded Care instructions: Spot clean with a damp cloth only. Do not immerse in water as this tends to harden the memory foam * Its ergonomic shape provides great neck and head support for your infant and can help prevent or correct plagiocephaly (flat head syndrome) * The memory foam pillow will be directly sealed after production , therefore may have some normal smell.