A much neglected aspect in the comparative literature on labour market flexibility has ignored how employers' use of flexibility is affected by national differences in labour market characteristics. In this paper the case of part-time work, in the retail banking sector in Britain and France, is taken to show how the preferences of available female workers, together with differences in educational attainment, childcare provision, legal regulation, personnel policy and organizational culture affect employers' use of this type of flexibility. The main argument of this paper is that the type of flexibility employers can obtain from female workers varies between countries. Thus employers design jobs, consciously or not, in response to these differences. This paper supports the approach which emphasizes the need to integrate an analysis of economic production with social reproduction so as to enrich our understanding, from a comparative perspective, of the nature of contemporary work organization.