As per Graphology, here are a few ideas that may probably hint towards various personality traits possibly found in people with different types of Size of Letters:
Some types of Size of Letters may indicate that the individual pays a lot of attention to details.
Similarly, some other types of Size of Letters might signify that the individual is introvert in nature.
Likewise, a few other types of Size of Letters may also imply that the individual likes to take shortcuts.
Fortunify 