A measurement jig 1 comprising at least one adjustable component 5-8 to take a measurement for customisation of seated equipment such as a wheelchair. The jig 1 may be arranged so that a user can sit on it and may have adjustable parts 5-8 including rotatable ones which can either be manually or electronically adjusted. Measuring means may be provided and these may take the form of sensors, a camera or a manual measurement indicator. A computer modelling system may be employed to use the results to generate a 2D or 3D model. This information may then be used to manufacture a device.
