The file 'Toy Captain America Shield 3D Printer Model' is (stl) file type, size is 2.3MB.
I printed this shield with 4 walls at 5% with PLA Silk. I think the infill doesn't matter cause of how small it is.
It is a remix from printables,
https://www.printables.com/model/36681-captain-americas-shield-display-v2
The titan shield (normal color cap) should fit pretty good if its a bit loose you could add tape to it or let me know and I can tweak it.
The unknown Cap (bigger toy) shield I needed to trim a bit of the square then put it in and it stays in snug.
new_cap_sheild_test_1.stl | 2.7MB | |
shield_test2_v2.stl | 2.8MB |