Mentosternal contractures are well-known complications after burns, scald injuries, and injuries with acid or lye. These contractures may cause severe deformities that are both functionally and aesthetically crippling. Reconstruction of the neck requires the transfer of large flaps of thin, pliable skin to optimally match the texture and color of the recipient region. With the introduction of free tissue transfer, the availability of flaps for reconstruction of large neck defects has greatly increased. Unfortunately, many of these flaps are bulky and are not well matched to the thin and pliable skin of the neck. This article introduces the expanded supraclavicular flap prefabricated with the thoracoacromial vessels for reconstruction of anterior cervical contractures. Their anatomic location, length, and arc of rotation make the thoracoacromial vessels an excellent choice for prefabricating the supraclavicular skin for its subsequent interpolation into the anterior neck. Skin expansion in the donor region not only allows coverage of the larger unit of the anterior neck but also modifies the morphologic characteristics of the transferred flap through capsule formation and fatty tissue atrophy, which is beneficial for obtaining an optimal neck reconstruction.