levelheaded, good, intelligent, major, kempt, goodish, biggish, estimable, respectable, considerable, level-headed, sizeable, goodly, king-size, plentiful, good for you, sinewy, hefty, tidy, boxcar, healthy, powerful, muscular, substantive, sound, outsize, plenteous, handsome, salubrious, hulking, honorable, rich, largish, large-scale, significant, brawny, oversize, substantial, husky
large (part of speech: adjective)
extensive, roomy, ample, large, lofty, colossal, soaring, magnificent, generous, enormous, big, voluminous, humongous, great, copious, awesome, giant, gargantuan, expansive, baggy, impressive, bulky, capacious, immense, towering, grand, cavernous, majestic, comprehensive, tremendous, princely, prodigious, vast, mammoth, huge, elephantine, gigantic, massive, spacious, grandiose
size (part of speech: adjective)
- " In this country, Frances, a sheriff is a pretty sizable man," he said, his thoughtful eyes on the fire, " about the biggest man they can conceive, next only to the president himself. - "The Rustler of Wind River", G. W. Ogden.
- Far below me a sizable stream here showed itself through the tropical vegetation as it hurried down to a hidden cove. - "Foe-Farrell", Arthur Thomas Quiller-Couch.
- As he spoke he opened a sizable door. - "Foes", Mary Johnston.