Just finished making a postage stamp block with 1/2" squares. It was fun but crazy. Stuck it up on my design wall and walked away. It's like going down a rabbit hole when you work that small. I think nesting the seams is important as well as an accurate scant 1/4" seam. The reason for the scant 1/4" is for the turn of the cloth; the few threads that are taken up when opening the seam once it's sewn. Working with small pieces can be done but it takes time and patience. Or, if you're like me, some mean bull dog determination.