I use the Flying Geese X4 No Math Ruler from Lazy Girl Designs, I got it on Amazon. I think it's even faster than the one demonstrated here and a lot less cutting, and absolutley no fabric waste to cut off; still end up with 4 'flying geese', absolutley love it! The real benefit is with one ruler, it allows you to make flying geese in 12 different sizes, and remember, NO MATH INVOLVED!