if I'm just making a few, I'll use the squares sewn together and cut into 2 triangles. If I am able to use my Accuquilt Go to cut them it's even better (depends on size), if I need a lot and Accuquilt isn't the right size, I use my Wonder Cut ruler--you sew two strips together (the width indicated on the ruler) and then use the ruler to cut triangles from your two sewn together strips--the cut is such that only one single stitch holds the triangle point together and it pops right open. Very accurate. I do find that since you now have bias edges, that is HST are finishing larger than 2.5" I use spray starch on the stripes before cutting.