The size is around 40mm, and it should be possible to print it in less than an hour. A perfect little extra present for a cold and cloudy winter day.
It can easily be printed in place, without support, if you do not scale it. The underside may be a little ugly though, due to a heavy overhang. If you plan to hang it up high, it may be best to print in the opposite way. Using a brim of 30 lines, seems to be perfect for this print.
Have fun!
The author hasn't provided the model origin yet.