The main purpose of this study was to determine student teachers' perceptions concerning the effects of class size with regard to the teaching process. A total of 41 fourth-year student teachers participated in the study. A questionnaire including open-ended items was used for data collection. The study revealed that there is a direct relationship between class size and motivation, teaching method used, classroom management, and assessment according to student teachers' views. Although carried with a small sample size, this study is expected to establish a firm basis for the future studies to contribute to teacher training programs, which enhance student teachers teaching abilities in both large and small classes.