My sibling requested a dogs Humerus model from me to help them study and it worked out pretty well, so here it is for all the poor students who also need to learn anatomy and want a simple model to learn with, be it printed or just as a 3D visual help. I eyeballed a lot of the details, so it's not 100% accurate and rather a simplified study helper. (For those who might need it, these models can be viewed with Paint3D, which is on almost every PC by default) 

Model size: 105.15 mm x 32.55 mm x 27.38 mm (full model)

                     105.15 mm x 31.03 mm x 12.13 mm (half 1)

                     104.02 mm x 30.7 mm x 15.24mm (half 2)

This model is only for private use, please don't sell or upload my models or prints anywhere.

For printing I cut the model in two halves and printed them next to each other. I then glued them together and got the model you can see in the pictures. I printed it with a small brim and tree supports generated by the slicer.

Scaling the model down should be fine to a certain degree, though a smaller size than this will probably loose details. Scaling it larger should be fine.

Feel free to let me know if you print one of these, I love seeing my models being printed.

Printer: Anycubic Vyper

Print settings: 10% Infill, 0.2mm layer height, brim (5 lines), default tree supports

Printer settings: 200°C nozzle temp. (0.4mm), 60°C bed temp.

Filament: PLA (in the pictures: Geeetech silk white)

If there are any other issues please let me know so i can try and fix them.