Hi! For the PSX collection the wall dimentions are: 3 Blender meters tall, 4 Blender meters wide. The walls for this pack should be either 3x3, or 4x4 Blender meters. I cannot check at the moment. If you’re using .fbx, then the models might import as 0.1 scale. The .fbx does it for some reason. I recommend trying other formats if that's the case!