You're almost done...you've done the hardest part now...time for the borders.
My 9 patch center measured 48 1/2" wide by 54 1/2" long...measure yours and make whatever adjustments you need to.
Cut 6 strips of white (that's what I used) 3 1/2" wide X the width of fabric...sew your strips together and cut 2 strips 54 1/2" long...sew to the sides of your top. Continue to sew strips together and cut 2 more strips 54 1/2" and add them to the top and bottom of your top. My top now measures 54 1/2" X 60 1/2"
Now you're ready to add your small 9 patch border...Make sure when you add your side borders that your border strip starts with a positive 9 patch on the left side and a negative 9 patch on the right side. This is important, I know because I goofed and had to take one off and flip it, because each border strip has a positive end and a negative end...so when you add your top and bottom strips you put the negative end on the left side of the top and positive on the right side....and the opposite on the bottom border. I know that sounds confusing as you're reading this but it will make perfect sense when you do it...you always want those 9 patches to nest nicely. With my 9 patch border on my top now measured 60 1/2" X 66 1/2".
Last border...Cut 7 strips of white 4 1/2" wide X the width of fabric...sew your strips together and cut 2 strips 66 1/2" long...sew to the sides of your top. Continue to sew strips together and cut 2 more strips 68 1/2" and add them to the top and bottom of your top. My top now measures
68 1/2" X 74 1/2"