The device is the size of a postage stamp.

VOA: special.2011.05.25

And you can't read it but there's a kind of stamp of approval here from the governor Nelson Rockefeller.

你没法领会这个，但是这里有,作为州长的尼尔森，洛克菲勒对此的承认。

耶鲁公开课 - 现代诗歌课程节选

I've seen students photocopy exams down to the size of a postage stamp.

我曾看到过学生将考试内容复印到,一张邮票大小的纸上。

麻省理工公开课 - 固态化学导论课程节选