A carrier frame for a child carrier is disclosed. The carrier frame includes a first frame element and a second frame element hingedly coupled to the first frame element about a hinge axis. The first frame element includes a main frame and an adjustable support. The adjustable support extends in a first direction substantially parallel to the hinge axis and is movable in a second direction substantially perpendicular to the hinge axis. The second frame element comprises a transition portion and a backrest portion. An angle is formed between the backrest portion and the transition portion. The transition portion has a width in the first direction smaller than a maximum width of the carrier frame.