A printable blank comprises a sheet with a with outline perforation lines defining a periphery of an object. The sheet is capable of being passed through a printer to have an image printed on it. The sheet also comprises run-out perforation lines extending from the periphery to edges of the sheet, wherein the sheet can be folded along the run-out perforations to detach the object from the sheet. A method for creating custom print structures includes running a printable blank sheet through a printer and then bending the sheet along run-out perforation lines to detach an object from the sheet. The object can then be folded along scored fold lines to assemble it into a three-dimensional structure.