Consoles for shelves in art noveau style.
The consoles comes in two mirrored parts - the side with level differences facing outwards from the shelf and the flat sides to prining bed.
Scale the STL-file to fit your ordinary IKEA shelf, se drawing picture with dimensions.
Be sure to mount the consoles secure to the wall so i endures the load/weight. One of the holes is pretty narrow to fit with a screwdriver - use screwheads that allows them to be mounted in an angle with a screwdrier, for example a hex key with a ball end.
No supports, no brim. Place the two parts with the flat side towards the printing bed and the side with level differences facing upwards.