In the case of the stompboxes, MG doesn't autosize these the same way as it does with synth modules. Instead, you have to have the exact dimensions as viewed from top-down in mm. When posting stompboxes, it's probably a good idea to check the manufacturer's site for these, as retailers don't always get those right.
That being said, it's always possible to adjust the listing(s) when you find errors, provided the listing(s) in question weren't locked by the manufacturer.
Also, images need to be cleanly cropped...some of these boxes in the build definitely don't have that going on...