Hmm...I remember encountering something like this awhile back when I was making a preset and the same thing occurred with the head shading, it was too big.
When I resized it, at first, it did look a bit small, but that was because I wasn't zoomed in at my usual 1OO%
Now, I use Gimp so I don't know HOW much different the two programs are from each other, but since the problem is similar maybe there's an almost similar solution. If you want to provide some pictures, that'll be great unless someone can help you beforehand.