An adjustable socket system comprising: a base ; a plurality of longitudinal supports connected to the base and extending along a longitudinal axis of the adjustable socket system , the longitudinal supports comprising a medial support and lateral support , both having an elongate configuration; and a plurality of shell components operatively connected to the plurality of longitudinal supports and at least in part defining a receiving volume adapted to receive a residual limb, the adjustable socket system movable between an open configuration in which at least one of the plurality of shell components is moved radially outward relative to the longitudinal axis to loosen a fit of the adjustable socket system , and a closed configuration in which at least one of the plurality of shell components is moved radially inward relative to the open configuration to secure the fit of the adjustable socket system on the residual limb; characterized in that the plurality of shell components includes a first shell component having distal and proximal parts that are longitudinally displaceable with respect to one another along a length of the medial support so that a length of the first shell component is adjustable between a first length (L1) and a second length (L2) different than the first length (L1),wherein an overlap is defined between the distal and proximal parts along the longitudinal axis and a length or size of the overlap increases or decreases as the proximal part moves toward or away from the distal part , wherein a contact surface area between the first shell component and the residual limb is variable as a consequence of the increase or decrease of the overlap between the distal and proximal parts . a base ; a plurality of longitudinal supports connected to the base and extending along a longitudinal axis of the adjustable socket system , the longitudinal supports comprising a medial support and lateral support , both having an elongate configuration; and a plurality of shell components operatively connected to the plurality of longitudinal supports and at least in part defining a receiving volume adapted to receive a residual limb, the adjustable socket system movable between an open configuration in which at least one of the plurality of shell components is moved radially outward relative to the longitudinal axis to loosen a fit of the adjustable socket system , and a closed configuration in which at least one of the plurality of shell components is moved radially inward relative to the open configuration to secure the fit of the adjustable socket system on the residual limb; characterized in that the plurality of shell components includes a first shell component having distal and proximal parts that are longitudinally displaceable with respect to one another along a length of the medial support so that a length of the first shell component is adjustable between a first length (L1) and a second length (L2) different than the first length (L1),wherein an overlap is defined between the distal and proximal parts along the longitudinal axis and a length or size of the overlap increases or decreases as the proximal part moves toward or away from the distal part , <EOS>