1. A is three(four, etc.)times the size(height, length etc.)of B.

The new building is four times the size(the height)of the old one.

这座新楼是那座旧楼的四倍大（高）/这座新楼比那座旧楼大（高）三倍。

2. A is three(four, etc.)times as big(high, long, etc.)as B.

Asia is four times as large as Europe.

亚洲是欧洲的四倍大/亚洲比欧洲大三倍。

3. A is three (four, etc.)times bigger(higher, longer, etc.)than B.

Your school is three times bigger than ours.

你们的学校比我们的学校大三倍。用times表倍数通常用于三倍以上，两倍可以用twice或double.

（来源：网络）