The phrase "hath sized up" could mean someone has evaluated or assessed a situation, person, or thing. Depending on the context, some possible synonyms for "hath sized up" are analyzed, estimated, gauged, judged, measured, evaluated, assessed, weighed, appraised, surveyed, and scrutinized. These synonyms underscore the idea that "hath sized up" involves careful observation and consideration of something in order to form an opinion or make a decision. By using a different term instead of "hath sized up", one can add a different layer of meaning or emphasis to the statement and provide more clarity to the intended message.