This a simple ball ornament you can hang on a Christmas tree or for any occasion.

It's a whole body design and NOT Split.  The circumference is 160 mm.  It can fit on an Ender 3 but will have to scale it down 50% or More if you want smaller ornaments.

******PRINTING RECOMMENDATIONS******

In the pictures I did not use any supports.  Although it's not a flawless 3D print, it came out really well, well even to hang or decorate.  Below are the settings I used on Cura.  NOTE:  Some of the suggested settings below will need to be brought from the settings table to use in the printing menu when making customized settings.  To access these settings below, go to the “3-line with dots” icon and type in in the information in the search bar for it to appear.  You can try these settings on other slicer programs as well:

Quality:  Detailed or Higher

Wall:  Wall Line Count:  4

                    Optimize Wall Printing Order:  YES

                    Wall Ordering:  Outside to Inside

Top/Bottom:  Top Layers:  4

                                   Bottom Layers:  4

                                   Top/Bottom Pattern:  Lines

                                   Monotonic Top/Bottom Order:  YES

Infill:  0% (YES, it was ZERO percent infill)

Temperature:  3-5 degrees lower than your usual temperature setting for your filament.

Speed:  Everything 30-40 mm/s; except for the travel speed which should be 5 mm/s above what you have.  (This will prevent stringing and allows your filament the time to mend together.)  Do Not change flow rate of the filament.

Travel:  Enable Retraction:  YES

                       Retract at Layer Change:  YES

                       Combing:  ALL

                       Avoid Printed Parts When Traveling:  YES

Cooling:  YES and at 100%

Supports:  NO, None

Build Plate Adhesion:  YES and select RAFT to keep the print more stable to the bed while it moves.