I chose the narrow border, the wide border and sewed the piano key yardage which I sliced into 5" strips. I was using up all of the leftovers so I couldn't make it any wider. I have a few strips leftover which I'll sew into a smaller section to sew in at a couple random spots in the wide border. The narrow border will go all around the triangle section and also at the outside edge of the piano key border. I had only intended on putting the wide border on the 2 sides but I may change my mind and put it all the way around. I like to design as I go. If I knew exactly what it was going to look like I wouldn't have any incentive to make it. The triangle section is 54" x 60" so my decision on the border will based on the size I decide it should end up plus the visual appeal. Part of the backing will be the same print as the wide border but with a red background.