Flat Earth Teaching Display, dimensions: (not inlcuding the dome) 148.69 x 116.85 x 148.66mm or 5.95 x 4.60 x 5.85in
This is a novelty item and a joke.
The file is 4 pieces, I did include the dome. If you have a resin printer or can get it vacuum formed it will fit just fine.
Scale up or down as needed, current size is based on the Form2 print bed.
If you need any help with the file let me know.