"disproportionately big" is a correct and usable phrase in written English.
It means something that is much bigger than it should be in relation to other things or compared to what is expected. Example: "Despite being a small town, the school's budget was disproportionately big compared to other schools in the area."
In their wake come Nevada (disproportionately Hispanic), South Carolina (disproportionately black) and Florida (disproportionately big).
The right hand extended to touch the face is disproportionately big and does not convincingly connect with the body.
"Fox," on the other hand, is bowed down with a head that is, like an infant's, disproportionately big and heavy.
Mieville: Subculture is becoming mainstream culture now, but when you do find genuinely excellent self-published texts the thrill of discovery is disproportionately big.
The heads are disproportionately big, the hands claw-like, the limbs flaccid or cricked and skewed in defiance of anatomy to get across further expression or character.
In these and other amazing small works by Zeshin, wizardly craft, fanciful imagination and deep traditionalism combine to disproportionately big effect.
The left leg is drawn disproportionately bigger than the right.
But there might be a disproportionately bigger impact from falling prices in the cheaper property at the softer edges of the market.
"It appears that they are recommending that climate science programs take a disproportionately bigger hit than other science programs," says Jay Gulledge, senior scientist and director for science and impacts at the Pew Center on Global Climate Change in Arlington, Virginia.
Since we do not specify who the recipients of the lump-sum transfers are, we should bear in mind that, even if a group's real remuneration is reduced by an increase in export taxes, its overall utility might increase if the group receives a disproportionately bigger share of tax revenues.
Humans divide up the rain forest by clear-cutting, and nature conquers by killing off a disproportionately large number of big trees in the remaining forest.
