より
than
A は B より + adjective
Sign up free to review this point on a spaced schedule.
より marks what something is being compared against: 東京は大阪より大きいです, "Tokyo is bigger than Osaka". It goes after B, the thing being beaten.
Japanese adjectives have no "-er" form. 大きい means "big" or "bigger" depending on whether there's a comparison in the sentence, so より carries all the work.
It works after verbs too: 思ったより簡単でした, "it was easier than I thought".
Word order is flexible (大阪より東京は大きい is fine), because より, not position, shows what's compared to what. The next point adds のほうが, to mark the winner as well.
Examples
東京は大阪より大きいです。
Tokyo is bigger than Osaka.
今日は昨日より暑いですね。
Today's hotter than yesterday, isn't it?
私は兄より背が高いです。
I'm taller than my older brother.
バスは電車より安いです。
The bus is cheaper than the train.
テストは思ったより簡単でした。
The test was easier than I thought.