You can enlarge or diminish any pattern. This is how to enlarge. Using a cup and saucer for a pattern, I traced it on to ¼" gridded paper (A).If I want to enlarge it to measure 6" across, and 3½" high, I make a grid with the same amount of squares 1" x 1" (B). Don't try to sketch the entire picture at one time. Instead, look for keypoints. For example: Note that horizontal line 4 and vertical line2 in fig. A, intersect (Marked with red). Make a similar line with the corresponding grid in your 1" grid. Do the same with horizontal line 4 and vertical line6. There is a horizontal line on 4 that spans vertical lines 4 and 6. Transfer the same to your 1" grid. You will see little triangles (Note the red squares). Keep transfering shapes to the larger grids, using your pencil lightly in case you need to correct the line. Note where lines intersect.
In the example above I have used ¼"=1". But now for instance, you want to fit a pattern to a certain dimension that is different. Say for instance that same pattern has to fit in a 8" across space. It is impossible to get an accurate grid without going into hundreds of an inch. You know how many squares are in that original pattern.Take a slip of paper, (I use adding tape) and measure 8". My original pattern is 6 squares across. I keep folding the adding tape, until I have the same amount of squares across. That will be the dimension for vertical as well as the horizontal lines for your grid.
I usually make thumbnail sketches of my patterns and have enlarged them to make
¼" = 6". It is just important to mark each grid with corresponding numbers.