- Isaac Johnson
- 10.196 centimetre(s)
- イタリア (Milan)
The largest mouth gape belongs to Isaac Johnson (USA) and measures 10.196 cm (4.014 in) as verified in Milan, Italy, on 22 February 2022.
Isaac's mouth gape was re-measured in the set of Lo Show dei Record.
Largest mouth gape (male): 10.196 cm (4.014 in) - Isaac Johnson 🇺🇸