System for collecting data of a face of a subject, with: - a template (10, 11, 12, 13) for collecting data of the face of the subject, wherein the template (10, 11, 12, 13) is manufactured of a sheet-like material and has a surface, an opening for the face of the subject in the surface, and at least one computer-detectable element for providing dimensional reference information, wherein the at least one computer-detectable element is at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) disposed on the template (10, 11, 12, 13), - a camera configured to record at least two 2D images of the template (10, 11, 12, 13) and the face of the subject within the opening of the template (10, 11, 12, 13), and - a computing device configured to provide subject facial dimensions of the subject based on the at least two 2D images taken by the camera, wherein each of the 2D images shows the face of the subject and the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49)on the template (10, 11, 12, 13), and wherein the 2D images show the subject and the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13) from different viewing angles, the computing device comprising: - at least one output interface (58, 62) for providing the subject facial dimensions, - at least one input interface (56, 62) for receiving the plurality of 2D images, and - a processing unit including a processor for processing the 2D images and a memory storing one or more routines executable by the processor, the one or more routines being adapted to: - determine a distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images based on a known dimension of the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13) and/or a known distance between two of said at least one markings (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13), - construct 3D data based on the 2D images and the determined distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images, and - provide subject dimensional data of the face of the subject based on the 3D data. - a template (10, 11, 12, 13) for collecting data of the face of the subject, wherein the template (10, 11, 12, 13) is manufactured of a sheet-like material and has a surface, an opening for the face of the subject in the surface, and at least one computer-detectable element for providing dimensional reference information, wherein the at least one computer-detectable element is at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) disposed on the template (10, 11, 12, 13), - a camera configured to record at least two 2D images of the template (10, 11, 12, 13) and the face of the subject within the opening of the template (10, 11, 12, 13), and - a computing device configured to provide subject facial dimensions of the subject based on the at least two 2D images taken by the camera, wherein each of the 2D images shows the face of the subject and the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49)on the template (10, 11, 12, 13), and wherein the 2D images show the subject and the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13) from different viewing angles, the computing device comprising: - at least one output interface (58, 62) for providing the subject facial dimensions, - at least one input interface (56, 62) for receiving the plurality of 2D images, and - a processing unit including a processor for processing the 2D images and a memory storing one or more routines executable by the processor, the one or more routines being adapted to: - determine a distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images based on a known dimension of the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13) and/or a known distance between two of said at least one markings (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13), - construct 3D data based on the 2D images and the determined distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images, and - provide subject dimensional data of the face of the subject based on the 3D data. - determine a distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images based on a known dimension of the at least one marking (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13) and/or a known distance between two of said at least one markings (22, 24, 26, 28, 40, 42, 44, 46, 49) on the template (10, 11, 12, 13), - construct 3D data based on the 2D images and the determined distance and orientation of the face and the template (10, 11, 12, 13) relative to the camera in each of the 2D images, and - provide subject dimensional data of the face of the subject based on the 3D data.