Hey Nick,
maybe you should read the fine manual:
https://www.onefinitycnc.com/support
We also have a search function. You will find much with “table” and “dimensions”, and you should consider that the foreman size can be deduced from the Journeyman and Woodworker sizes. Foreman (1200 x 1200 mm) is a Journeyman with one X-50 rail and two Y-50 raills. Journeyman (1200 x 800 mm) is X-50 and two Y-35 rails. Woodworker (800 x 800 mm) is either one X-50 or one X-35 rail and two Y-35 rails.
See also this post