The first step in the bunting process is deciding on triangle size and shape. Most sites I went to go for the "perfect triangle" which I grew up as knowing as an equilateral triangle, but whatever. That would be all angles 60 degrees and all lengths the same for those geometry-challenged. I thought I would go for the isoceles (2 angles and lengths the same) as I wanted them a bit longer and more pennant shaped, but not TOO pointy. I whipped out my trusty ruler and protractor and went to work. After doing a few rough designs, I decided on 2 angles of 65 degrees and the other 50, and the top length 13 cm (because I love 13, I know, weird). I also have a paper cutter to make sure my lines were straight (way back from the scrapbook days).
Awww brother-sister love!