size amount, bigness, bulk, dimensions, extent, greatness, hugeness, immensity, largeness, magnitude, mass, measurement(s), proportions, range, vastness, volume
pint-size
diminutive, little, midget, miniature, pocket, pygmy or pigmy, small, teensy-weensy, teeny-weeny, tiny, wee
size up
appraise, assess, evaluate, eye up, get (something) taped (Brit. informal) get the measure of, take stock of