Zhèɡe hézī zhēn dà！

这个盒子真大！

The box is absolutely huge!

Notes:

这个(Zhèɡe): this

盒子(hézī): box

真(zhēn): really

大(dà):big

Example:

A：这是谁的盒子？

     Zhè shì shéide hézi?

     Whose box is this?

B：这个盒子真大。

     Zhèɡe hézī zhēn dà！

     The box is absolutely huge!