On occasion the perfect cross stitch pattern may need one adjustment, a resize for your current project. This is a guide about resizing a cross stitch pattern.
How do I make a cross stitch pattern bigger so instead of doing it on 18 I can do it on 14?
Like others have said you can use any pattern on any count of fabric. To know how much fabric that you need the pattern will tell how many stitches wide and long it is, take lets say the width count of your pattern divide that number by the count of your fabric. This will give you the size of fabric needed for the pattern you then need to add 6" for easement and framing. Do the same for the length of the pattern.