The radial forearm free flap has become the mainstay in the reconstruction of soft tissue defects following ablative resection in the oral cavity. The method of repair of the associated forearm tissue defect has been the subject of considerable debate. The options range from direct closure, to local soft tissue flaps or skin graft repair. Larger defects usually require a skin graft and we have routinely used partial thickness skin. An audit of our complication rate led to the consideration of whether a full thickness repair would reduce the morbidity. We randomly allocated successive patients to receive full or partial thickness skin graft repair of the radial donor site in a consecutive series of 68 patients over an 18-month period. Sixty-four patients completed the initial assessment period of wound healing. Thirty seven patients completed a questionnaire at one year to subjectively assess the aesthetic appearance of the forearm wound and the skin graft donor site. They were also assessed for pain at both sites. The partial thickness donor site required significantly more re-dressings. There was no significant difference between the two groups in graft take or number of re-dressings at the recipient site. There was no significant difference in patient assessment of aesthetic appearance or pain in either the forearm recipient site or the skin graft donor site. Provided that an adequate graft is taken, full thickness and partial thickness skin grafts have the same short-term and long-term outcomes in the repair of the radial free flap donor site.