Size And After-sales Service: S (0-6Month), Clothes Length 71cm, Chest Circumference 32cm, Recommended Height 50-70cm. M (6-12Month), Clothes Length 81cm, Chest Circumference 33cm, Recommended Height 70-85cm. L (12-18Month), Clothes Length 91cm, Chest Circumference 34cm, Recommended Height 85-110cm. You can contact us at any time if you have any questions before or after your purchase. We will answer your questions and give you the most suitable solution. Flexible Design: It adopts an excellent shape and conforms to the baby's ergonomic design. It wraps the baby's body in 360 degrees, and the baby blanket is not easy to feel restrained when the baby turns over when sleeping. NOTE: When washing our baby sleeping bag, the water temperature should not exceed 50?, do not bleach, do not dry clean. Two-Way & Side Zipper: Our newborn swaddle equipped with a two-way zipper, which can be adjusted through this two-way zipper according to your needs. Our baby sleeping bag is side zipper design, which is convenient for you to change your baby's diaper. And it can also reduce the chance that your baby feel cold due to the gap between the diaper changes. Suitable for both newborn boys and girls as a gift. Detachable Sleeves: Comes with one set of long sleeves and one set of round sleeves. The sleeves of our baby sleeping bag is detachable, which can be removed or installed by adjusting the zipper according to your own needs. Easily change the sleeves you want can make our baby sleep more comfortable and safe, which can not only effectively keep warm, but also facilitate the baby's hand activities, more convenient for the baby to play, and let the baby spend a happy winter. 100% Cotton & 2.5 Tog: Made of high-quality pure cotton fabric, the material is very skin-friendly and comfortable to the touch. Our sleeping bag is filled with 2.5 Tog, which is suitable for spring, autumn and winter. And this newborn sleep bag is also a perfect newborn birthday Christmas gift for new born baby.