Indicated for infants 15 lbs+| Shoulder to toe measurement 30'' | Fabric is 100% cotton and may shrink up to 1'' after washing. Fits best for 6-12 months* *Ages are approximate. For best fit select size according to your baby's weight then height. Gentle weight is located on front (or top) of the weighted sack only. Design is intended to promote side or back sleeping. The ORIGINAL weighted sack designed to naturally reduce stress and increase relaxation through deep-pressure stimulation. Lightly weighted to mimic your hug and give your baby feelings of security and comfort to help fall asleep faster and stay asleep longer Eases the transition from the swaddle