size up

Verb

 * 1)  To evaluate; to estimate or anticipate the magnitude, difficulty, or strength of something.
 * It's a good idea for boxers to size up their opponents before their matches.
 * Before we can begin to size up the problem, we'll need more information.
 * 1) * The Century
 * We had to size up our fellow legislators.
 * 1) To wear a larger size of clothing.
 * This shirt runs tight, so you should size up.
 * This shirt runs tight, so you should size up.