Baby Bjorn Original Carrier and Bibs
The carrier can be used from first week for babies at least 21 inches (53 cm) tall and weighing at least 8 lbs (3.5 kg).
The leg straps should be used for babies ages 2 months and under to reduce the size of the leg openings.
The carrier can be used as long as you wish to carry your baby, or 22 lbs.
Amazon Review of a Similar Product