What are the size requirements for children using the Stroller Seat? July 21, 2022 18:19 Updated Use from birth with included, reversible infant insert up to 50 lbs. Related articles G5 Stroller + Seat User Guide Can I fold the Stroller Base with the Stroller Seat attached? Can I use the Stroller Seat or Bassinet in the car? G5 Toddler Seat User Guide Newborn Insert Instructions