n. 25B6; noun the room was of medium size : DIMENSIONS, measurements, proportions, magnitude, largeness, bigness, area, expanse; breadth, width, length, height, depth; immensity, hugeness, vastness.
25B6; verb the drills are sized in millimetres : SORT, categorize, classify.
25A0; size someone/something up (informal) ASSESS, appraise, form an estimate of, take the measure of, judge, take stock of, evaluate; Brit. informal suss out.