Hello, I suggest you "resize" in any image-editor as -for example- "paintbrush" (start-all programs-accesories-PAIN BRUSH) there you open your picture in File-open....you will open the picture you need to edit, once be open you resize in Image-Stretch/Skew and resize acccording the large you need,,,council: save as with a new name to do not lose your original pic.
All the best!