I'm thinking two issues may be occurring. Either you're printing an image and the button that says "Fit to page" is selected (which if it is then deselect it and try again), or two the image is really big.
If the image is too big, try re-scaling in paint:
Steps
1. Hop into paint.
2. Go to the top left icon and select "open".
3. Locate your picture and click "ok".
4. Click the re-size tool and leave the scaling on "percentage", I think 25 should be fine enough.
5. Save that image and try printing now.