The paper addresses the call for methods that can assist designers to consider anthropometric diversity when designing products or workstations, and hence formulate more sustainable design solutions. A basic method for the definition of boundary manikins for bivariate design problems and combined populations is described, exemplified and evaluated. The method can be used for defining virtual test groups when using digital human modelling tools for evaluating anthropometry related aspects of human-product interfaces at early design phases. It can also be used to indentify persons with certain anthropometry to build up test groups for performing physical tests.