Work in progress. I realize the top and bottom bones barely meet in the center and will update soon with a repaired version that connects properly. Until then, if yours snaps, you can use super glue.

Print face up with supports under the opening for the 4x6 picture. You'll need to add a separate hanger or stand to the back.

Will update with files for different sizes. The original version is fairly delicate.

Creality

Ender 3

No

Yes

standard

20

Should print in approx. 1hr 45min with minimal support density.

Designed in tinkercad.