3 sentences

1. 大家挨个儿走出了教室。

   dà​jiā āi gè​r zǒu​chū le jiào​shì.

   Everyone walked out of the classroom one by one.

   Source: Dong Chinese Dictionary

2. 他是个大个儿，在人群中一眼就能看到。

   tā shì gè dà gè​r, zài rén​qún zhōng yī yǎn jiù néng kàn​dào.

   He is a tall guy who can be spotted instantly in a crowd.

   Source: Dong Chinese Dictionary

3. 你看这虾多大个儿。

   nǐ kàn zhè xiā duō dà gè​r.

   Look at the size of these shrimp.

   Source: OpenSubtitles