I made this simple frame to fit a large size Polaroid instant photo (89x108mm). The slot in the back is cut out to allow for easier removal of the photo without touching the front.
I printed it at 0.2mm layer height which took around 4.5h including supports for the top bridge. The third photo shows my support setup which was autogenerated by Prusaslicer, it should be possible to do with less support to save time and filament.
The author hasn't provided the model origin yet.