The soother attached to the Sleep Buddy is one size just like a mother's nipple. It is suitable from new born and onwards. Helps prevent the development of thumb sucking habit. Lightweight construction of the Sleep Buddy is suitable for newborns. The comforter eases the baby to sleep with its soothing soft texture. The unique double sided teether provides soothing for the sensitive and aching gums. Weight and size is designed to make it easy for tiny fingers to grip and hold on. The unique double sided texture supports sensory development.