Indicated for infants 20 lbs + | Shoulder to toe measurement 34'' Fits best for 12-18 months* *Ages are approximate. For best fit select size according to your baby's weight then height. The ORIGINAL weighted blanket sack designed to naturally reduce stress and increase relaxation through deep-pressure stimulation. Gentle weight is located on front (or top) of weighted sack only. Design is intended to promote back and side sleeping. Lightly weighted to mimic your hug and give baby feelings of security and comfort to help baby fall asleep faster and stay asleep longer