This study investigates elementary school teachers' perceptions of the appropriate proportions of cartoons for instructional purposes, with a focus on the Thai educational context. The research aims to shed light on teachers' preferences for cartoon proportions across different grade levels, contributing valuable insights into the effective use of cartoons in elementary school instruction. A questionnaire-based approach was employed to gather data from 78 elementary school teachers. The study found that teachers held a positive perception of cartoons as effective tools for teaching primary school students, with participants favoring distinct cartoon proportions for different grade levels. Notably, larger cartoon scales were preferred for early grades (Grade 1 and Grade 2), while smaller scales found favor with older students in Grades 4, 5, and 6. These findings highlight the nuanced considerations educators make when integrating cartoons into their instructional materials and underscore the potential of cartoons to enhance the quality of elementary school education.