This study examined the relationship between day care center size and child care workers' level of job commitment and job satisfaction. Surveys were completed by 128 teachers and aides who worked full-time in non-profit child care centers in the Chicago metropolitan area. The results of the data analysis revealed that there was not a statistically significant relationship between the two variables. Working conditions, pay, and opportunities for advancement were, however, positively related to center size, as measured by total staff employed. In addition, workers' total level of job satisfaction appeared to have a positive relationship with center size. The results of the study suggest that there is a moderate relationship between center size and the job satisfaction of child care workers. (A copy of the survey questionnaire is appended. Contains 29 references.) (MDM)