Thats being printed on a 400mm x 400mm print bed. I use an upgraded Ender 3 printer with the “Ender Extender” kit. A stock Ender 3 is 235mm x 235mm print bed.
There are some larger format printers that have large print areas from the manufacturer. HIGHLY suggest you stick to Creality brand (or Prusa, but those are expensive!). Creality is solid, has a HUGE user base, and minimal issues.
The large maze is 340mm x 230mm x 70mm (just opened the file).