that's not a real picture of a real metal object - it will need to be adapted to be one piece and the veins and some features need to be much wider - the red line shows one vein is a .1" wide strip to scale at 48" wide - it will still look good but it won't have such thin lines
the image is 48" x 34" - if you want it to be 4 ft.² it can be centered in a square
or it won't look too good to just stretch it that much vertically so some additional leaves and background will have to be added and that will add some additional cost