I am making a quilt that is originally 49" X 62". I want to make it 66" X 88" to fit on a twin size bed. I was able to easily work out the width to the right side, but even with adding an extra row of blocks and 2 rows of sashing, I still come up with a total of 79". I was trying to keep my side borders and top and bottom borders the same, but it is not working. Is it okay to make my borders different sizes to make this work? I don't have a way to post a picture of the quilt I am doing, but all of my blocks are twelve inches. Sashing is 1" there is a border before the main border that is 1/2" all the way around and borders are 4" (originally) but I changed them to 6". In the original pattern there are 3 blocks in 4 rows. I changed it to 4 blocks in 5 rows.
Any help you can give would be greatly appreciated.