A November 2021 model 1000mm X-Carve CNC machine has a maximum cutting area of 750mm x 750mm x 114.3mm (from the bottom of the x-carriage to the top of the waste board). The open frame configuration allows for some longer-size materials to fit into the machines to be carved.
Full technical specifications can be found here: https://www.inventables.com/technologies/x-carve/specs.