I printed a Hueforge picture as big as I could make it on my printer and did not even think about how I was going to fit the right size frame until after. I made this frame with Tinkercad to fit. My picture was 236mm x 236mm. I overestimated the size I would need and 236x236 is probably the SMALLEST it will fit. It will definitely go up to 241x241. It is measured almost EXACTLY 242, so it might fit that as well. The slot on the side is where you can insert the picture. The slot is 2mm wide. A 5mm picture might fit if you put the frame together around it. It would be easier to get a picture out of it if that slot was repositioned a bit. Since my printer can only print this file diagonally, I split it into two pieces. I was able to print them at the same time. The bowties are for making lining the parts up easy. They hold it together pretty well, so I am not even going to glue mine. This print uses a lot of filament, almost half of a roll. I guess that is what happens when you need something to be huge.

There are no holes on the back of this one. I made this to be hung with 3M Command Strips.

The completely awesome picture of Notre Dame Cathedral seen in the frame is by Moquai and can be found here:

https://www.printables.com/model/1237643-hueforge-notre-dame-wall-art