Regardless of the dimension that you are modeling in GeoGebra, your model will be rescaled and exported to STL automatically with ~4 cm on its bigger dimension. For instance, if your model in GeoGebra looks like 6 x 6 x 8, then it will be exported to STL as 3 cm x 3cm x 4cm.[br][br]If you want something bigger or smaller than that, you can still rescale it in the 3D printer software. [br]The thickness of all objects in that case will be rescaled as well. By default, GeoGebra is exporting to STL under the follow dimensions:[br][br]ø 3.5 mm for curves and segments;[br]ø 3.8 mm for points; [br]~ 3.2 mm for surfaces. [br][br]You can find more details about that in [url=https://www.geogebra.org/m/pkfzccjw#material/yaxnk8pd]Setting the 3D printer software[/url].