On 22 February 2022, in Milan, Italy, a meticulous and scientific re-measurement of Isaac Johnson’s jaw mobility was conducted during the set of Lo Show dei Record. The world-class team, utilising standardised medical equipment, recorded a truly unprecedented opening — officially certifying Isaac Johnson (USA) as the holder of the title for the Largest Mouth Gape, with an astonishing measurement of 10.196 centimetres (4.014 inches).

This achievement surpasses previous benchmarks and sets a new global standard of physical excellence and human potential. The verified measurement was conducted with precision instruments and meets the full requirements of World Records Authority’s verification standards, ensuring complete accuracy and scientific credibility.

Isaac Johnson’s jaw mobility is a naturally occurring anatomical distinction — a remarkable feature of human physical variation that places him in a category entirely his own. His willingness to submit to rigorous scientific measurement and official verification reflects both the sincerity of his claim and the integrity of the WRA certification process.

World Records Authority extends its formal congratulations to Isaac Johnson on this historic accomplishment, recognising it as a landmark entry in the annals of human physical achievement.