I have been making string quilts for kids. My smallest pieces have been about 5-1/2" to 6" at the largest part of the triangle. I mark a square ruler in triangle shape and mark with painter's tape. I sew 2 - 2-1/2" strips together, sew two more strips, put dark fabric strip on top, second piece I flip it to put light strip on top. Sew on each side, lay triangle ruler on bottom seam and cut both side. It takes four of those squares to make a block. I hope this helps.