This egg was made to fit a penguin plush toy of my son's. It is around 12 cm wide and 12 cm tall so it could also be used as a bowl of some sort i guess.

The egg can be printed without any supports. The bottom of the shape is cut off so there is a flat surface and no print angles are above 65 degrees. All walls are minimum 1.2 mm which means 3 lines if printing at 0.4 mm line width.