Originally Posted by
Aszule
What is a good size to make the triangles?
The larger the block the fewer blocks you will need. But you want to keep it small enough for the repeat in the fabric. I'm much better at being able to tell in person. When you get the fabric, if I were you, I would cut an equilateral triangle hole out of a box (the size after you remove the seam allowance) and a fold up makeup mirror and see what it looks like. I have a feeling sides somewhere in the 4.5" range might work, but you'll know better when you see the fabric in person and you are figuring out where you are going to cut.
The book will really help you with this step too.