I am in the process of making 1024 half square triangles out of three inch squares. I have not done a counting lately, but I think I am nearing the halfway point. There is no rush on this project, I do not even have the design finalized, so leaders and enders is really the only way to go. It all started a number of years ago when I inherited lots of old smokey black prints. Lots of them! When I ran them through the scrap users system, most came out at 3" square. I also had a gracious plenty of 3" brights; this, I decided, was a match made in heaven.
I think they look terrific together. I have used up the original black scraps, but I have found that bargain bins of scraps, and on-sale fat quarters nearly always contain black fabrics. You can get forty-two 3" black squares out of a $1.00 fat quarter. And you get two 2-5/8" squares (yes, these are that tiny) out of each pair of 3" squares (2-1/8" finished). I really enjoy working with them; it is always fun to pull back the black for the big reveal.
Sometimes there is not quite enough black showing; those go into the scrap basket for the next project. The only thing I do not enjoy is ironing them. I am mostly caught up now, and I am trying to stay that way. I keep ironing the ones I just finished, along with whatever else needs ironing. 1024 seems like a huge number of units; I could never do this without using leaders and enders.