Antonyms of adj half-size

1 sense of half-size

Sense 1
half-size -- (half the usual or regular size)

INDIRECT (VIA small, little) -> large, big -- (above average in size or number or quantity or magnitude or extent; "a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world")
INDIRECT (VIA small, little) -> large, big -- (above average in size or number or quantity or magnitude or extent; "a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world")

Similarity of adj half-size

1 sense of half-size

Sense 1
half-size -- (half the usual or regular size)
       => small (vs. large), little (vs. big) -- (limited or below average in number or quantity or magnitude or extent; "a little dining room"; "a little house"; "a small car"; "a little (or small) group")