Sizable

Adjective

 * 1) fairly large
 * He gave a sizable cash donation. Sizable enough that the IRS wondered where all that money came from.

Thesaurus
Gargantuan, amplitudinous, astronomical, awesome, big, boundless, bulky, bumper, colossal, considerable, cosmic, enormous, extensive, galactic, gigantic, good, goodly, grand, great, healthy, hefty, huge, immeasurable, immense, infinite, king-size, large, large-scale, major, mammoth, man-sized, massive, massy, monster, monstrous, monumental, mountainous, numerous, outsize, overgrown, prodigious, respectable, sensible, smart, spacious, stupendous, substantial, tall, tidy, titanic, tremendous, vast, voluminous, weighty

Alternative forms

 * sizeable