- Who
- Mikkel Hartmann-Petersen, Søren Anker Madsen
- What
- 0.998 square centimetre(s)
- Where
- Denmark (København)
- When
The smallest printed magazine advertisement is 0.998 cm² (0.154 in²) and was achieved by Mikkel Hartmann-Petersen and Søren Anker Madsen (both Denmark) in Copenhagen, Denmark, on 21 September 2021.
This smallest advertisement is for the podcast Amazing Records published by Carlsen.