Meanings of sizable increase in English

If the BBC's marketing campaign pays off, it should see a sizable increase.

Whether Trump will be able to get a sizable increase among African-American voters is far from clear.

Even so, Apple's seen a sizable increase in adoption of its little streaming box, perhaps due to its dead-easy integration with the iOS ecosystem.

I add support to Rundle et al.'s argument by demonstrating that doubling of out-of-school time alone may lead to a sizable increase in childhood obesity.