it is sorta like snowballing one corner. be sure you are going the correct direction...the border strips measure the same as the side of the block+sashing to which they will be attached.
mine were 14 1/2 inches,..... 12 1/2 for the block and 2 for the sashing
Last edited by SunlitenSmiles; 03-06-2015 at 07:59 AM.