This study explored the effects of enlarged words in text messages on receivers' affective judgment of the contents. In order empirically to investigate the effects, we conducted two experiments: One was a preliminary study to observe general user responses to enlarged text messages, and the other one was a survey to measure emotional responses of users when contexts of text messaging were specified. Based on the results, we revealed positive and negative aspects of using enlarging words as a nonverbal cue in text message communication.