There are several ways to do this I suggest one of the following.
1) You can use an image editing software to shrink the image. I recommend
GIMP .
2) Use CSS to adjust the width and height of your image.
If you are using the image as a background image you would have to use the first option. If this doesn't help or you would like an example please post the code you are currently using, and I would be glad to help.
Thanks,
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