This paper exploring the idea has as Fig 1. a to-scale illustration of a 5-Earth-mass primordial black hole: https://arxiv.org/pdf/1909.11090 https://arxiv.org

This paper exploring the idea has as Fig 1. a to-scale illustration of a 5-Earth-mass primordial black hole: https://arxiv.org/pdf/1909.11090 https://arxiv.org/pdf/1909.11090 As I recall, it did not get printed this way because the ink would be too expensive, or mess with the paper.