I have a weird issue I can not wrap my head around. Using Gimp for my game card design I used the Image Size setup of 825x1125 pixels. However when I import the card printing template that has the same size it appears smaller then the image size. How can that be? I am super confused.
You are mixing up two tools:
- The "Scale image" dialog is for
Image>Scale image. This scales the whole image (all layers, channels, paht, existing selection mask...). Initially this dialog display the current image size, which is identical to the one in the "File properties" dialog from your file explorer (on the left).
- The dialog on the far right is the "tool options" for the Rectangle selection tool. It shows the size of the selection marks, and the selection is smaller than the complete image.
It looks like you are confused by the additional layer with instructions. The layer you should be working with is visible in the background of your image. You can delete the instructions layer, or hide it, or move it to the bottom of the layer stack so that it is no longer in the way.