Baby Carrier Move is easy to adjust as your baby grows. You’ll find adjustment instructions and an adjustment buckle on the inside of the baby carrier’s front section. Adjust the buckle according to the length of your baby. The length setting is approximate. Hold the buckle flat. You may need to apply some force as the buckle is designed to be difficult to move for safety reasons. Should arms press on the lower or upper edge of the armholes, adjust the length setting.