Side Carrier: After neck is sucked (around 3 months) to 24 months.
Face to be carried: After your waist slips (around 7 months) to 24 months.
Positive to hold: After your waist is swelled (around 7 months) to 24 months.
Waist Carrier: After your waist is swelled (around 7 months) to 36 months.
There may be some loose threads.We appreciate your understanding.