Check the fish, not the frame
Open your preview at full size and hold it next to the photo. Look at the scale pattern first, then the spots and the fins. On a mirror, the big scales along the flank are how anyone who's banked that fish will know it.
If something's drifted, try another style. Some suit some fish better. The ink print likes a tight crop of the fish, while the pencil study copes well with a busy swim behind.
Want it exactly as you took it?
Then skip the styles and print the photo as it is. Nothing is changed, and you'll see which sizes the file supports before you pay.
Not sure which shot to use? Read how to photograph your catch first.