1909 24 Oct. (Mag.) 4/1 From the almost closed door of the conning tower there comes a razor-thin blade of light.
1971 C. Bonington viii. 95 I..peered over the top, to see that the ridge was now razor-thin and looked even more difficult beyond the point I had reached.
1997 25 Jan. 99/3 Nor is lending to companies likely to help much. Razor-thin margins show no sign of increasing.