Denoise and Sharpen shrinking photos

Every time I use Denoise or sharpen they keep shrinking my photos from A4 size down to passport size, so you cannot view them and when you try to enlarge the photo you cannot make out the photo. This happens on both raw and jpeg photos. My camera Nikon D500 with nikon lense mainly 300mm F1.4E fp

You need to provide a little more information … how do you know that have “shrunk”? What are the input images and what are the output images?

If you open the image on another application does it display correctly?

If the output is DNG search the site as there are explanations for that.