In this research a design procedure is developed and presented by example that allows an device dimensions to be sized so that its response approximates the desired ideal linear responses and the desired force or stiffness (force-displacement) capacity. This method is validated by systematically by comparing device designs with equivalent ideal linear models to assess how well they meet design goals, using an experimentally validated nonlinear model. Methods are presented for the most common device control laws in terms of the basic device dimensions. Errors were generally less than 10%. The overall approach is seen to deliver the device dimensions for a highly linear device response that meets design specifications, and is the first generalised design approach presented for these semi-active resetable devices or any similar semi-active device.