Fast development of nanostructurisation methods like focused electron beam induced deposition (FEBID) or two photon lithography created an opportunity to manufacture complex-shape functional structures with potential ap- plication in many different fields, amongst which nano-magnetism and spintronics are notable example [1]. High spatial resolution combined with significant flexibility of shape design and possibility to either directly deposit mag- netic material or to combine nanostructurisation with thin film deposition techniques made FEBID one of the most promising methods of manufacturing of structures with interesting, geometry-induced magnetic properties and spin textures like magnetic double helices [2], wireframe structures [3] or domain wall conduits [4]. To properly characterise magnetic properties of such nanostructures’ methods with high spatial resolution and high sensitivity, like synchrotron based XMCD are commonly applied [2]. In our group, a new, dark field magneto-optical Kerr effect (DF-MOKE) magnetometer was recently developed [4]. It upgrades the standard MOKE magnetometry, by exploiting the possibility to separately detect light reflected from different planes. Thanks to this, it allows for characterisation of 3D magnetic nanostructures, if their plane of specular reflection is geometrically separable from the plane of the substrate on which they are deposited. In this contribution, the results of DF-MOKE characterisation of ramp-shaped domain wall conduits prepared with combination of FEBID and physical vapour deposition will be presented. The structures were 3D-nanoprinted using an open-source f3ast package developed in our group [5] and covered with thin layer of magnetic material. Results of investigation of the light reflected not only from single ramp but also from sets of nanostructures will be pre- sented. Potential application of DF-MOKE to investigate more complex-shape structures (or arrays of structures) with multiple planes of reflection will be discussed.