Attempts to discover any possible links between company size and the handling of human resource management (HRM) in the case of Spanish industrial production workers. The data used as a basis for this study were obtained by means of a survey carried out on 965 Spanish industrial firms covering such aspects as compensation policy, job design and training. The results provide evidence of significant differences in the majority of the practices included in the survey, with a tendency towards their fuller development in larger sized firms. Some areas of human resource management, however, such as job description, promotion within the firm and the use of incentive schemes, do not differ.