I started one a few months ago. I was making the diamonds instead of the typical flowers. I started with a 2" hexagon but I wasn't all that happy with it. I changed to the 1".
I'm using the freezer paper method to make my hexagons. It's so much cheaper than buying hexagons. Granted, it is a bit more labor intensive having to trace and cut the paper hexagons. Thankfully many years ago I purchased a multi-sized hexagon template from Yours Truly which makes it a bit easier. There are several hexagon templates on the market today that could be used.
The tutorial (with photos) for the freezer paper method is here:
http://sewmanyways.blogspot.com/2009...r-piecing.html