This baby sleeping bag is perfect for in between months. It is ideal to keep your baby warm when it gets a bit chillier but also absorbs well in warmer months. The sleeping bag has an opening around the back and a 2-way zipper, suitable for use in the car seat and Maxi-Cosi., , Size Chart:, Newborn: 60 cm, 0-6 Months - 70 cm, 6-18 Months - 87 cm