Designed to fit my 24" Hasbro Captain America shield, though probably adaptable enough that it'll fit any shield size. I have the metal version of the shield, which is real damn heavy, so I printed mine at 100% infill to ensure that the brackets are strong enough to support everything.
The bottom bracket has three screw holes for tapered screws to distribute the weight of the shield. The top bracket is a post-and-slide mechanism that allows you to clamp it down on the shield to hold it in place on the wall, while still being able to slide it up to take the shield off the wall in the event you want to play around with it. The post is ever so slightly oversized in terms of height to give you a bit of room to slide the top clamp up and down. I found it worked pretty much straight off the print bed this way.
