size up
US /saɪz ʌp/
UK /saɪz ʌp/

1.
avaliar, analisar
to assess or evaluate a person or situation
:
•
He tried to size up his opponent before the match.
Ele tentou avaliar seu oponente antes da partida.
•
She quickly sized up the situation and knew what to do.
Ela rapidamente avaliou a situação e soube o que fazer.