We recommend that your base should be no smaller than the floor size of the new greenhouse and no more than a few inches larger.
Dimension A = 3840mm
Dimension B = 2570mm
Dimension C = 630mm
Dimension D = 1270mm
Dimension E = 2570mm
Overall width from side to side (A) = 3840mm
Overall depth from front to back (B + D) = 3840mm (2570mm + 1270mm)