paper-thin

As late as 1948 NKP, for its part, pitted its Berkshires against borrowed road diesels and declared that the difference in costs was less than paper thin.

Compared with Saturn's size, the rings appear paper-thin.

The walls appear to be made of solid blocks of stone, but are in fact paper-thin.

They say there's only a paper-thin difference between love and hate, but I hate what I hate.