A wide part of the proposed paper is devoted to designing soft magnets using a stereolithography 3D printer. A state of the art on soft magnetic materials is carried out together with an overview of the existing printing technologies to obtain complex non-machinable and solid magnets. All steps to implement such magnets using this method are detailed. A cushion made of a 30% mass ratio of magnetic powder included into a commercial resin is printed. In order to justify the interest of the process-flow, the material is characterized (mechanically and magnetically). A discussion about results explains limitations and advantages of the process.