ISO 7176-5:2007 specifies methods for the determination of wheelchair dimensions and mass. This includes specific methods for the determination of outside dimensions when the wheelchair is occupied by a reference occupant and the required manoeuvring space needed for wheelchair manoeuvres commonly carried out in daily life. ISO 7176-5:2007 specifies requirements for the disclosure of the dimensions and masses and contains five informative annexes. Annex A specifies methods for the determination of technical dimensions that can be important to the performance of the wheelchair. Annex B provides detailed information about pivot width and reversing width. Annex C provides detailed information about the turning diameter. Annex D provides details on determining the wheelchair longitudinal axis and wheelchair centre-point. Annex E provides technical guidelines and interpretation for many of the measurements specified to facilitate improved understanding, design and construction of wheelchairs. ISO 7176-5:2007 is applicable to manual wheelchairs and electrically powered wheelchairs (including scooters).