Update: Added version with hearts and stars.
This is an oval box I designed for my granddaughter. It has two internal trays and a push button latch.
The internal trays are printed different colors which show through the the cutouts in the bottom. I've also included a plain version with no cutouts.
The overall size is 120mm wide by 85mm deep by about 85mm tall.
Each version is packaged in a separate zip file.

My prototype is made from PLA.
The hinge is secured with a short length of 1.75mm filament. You will possibly need to drill out the holes first.
I have packaged a complete set of parts in three separate zip files. One for each version.

The orientation presented in the STL file should be correct for printing. I printed my prototype using 0.200mm layer thickness.
Use the above photos as a guide for assembly.