I found this amazing idea for half square triangles by the Missouri Star Quilt Company on Youtube. I thought I would do it to make sure it really works and see how accurate this is...... First take two charm squares. Stack them up, right sides together. Sew a 1/4" all around the outside edge. I started on a side but now realize I should have started in a corner, but it doesn't make that much difference. It will look like this....you can see my little wobble on the left hand corner... Use your rotary cutter and ruler and cut from corner to corner. Flip them open and voila! you have perfect half square triangles.....One note of caution, the edges are on the bias. It is most important to PRESS not IRON your finished square. This is a cool idea and I will use it in the future. If you measure a charm square they are a little bit over 5", as you can see in this picture. If you cut your own charm squares exactly 5" you will get an exact 2 1/2 " finished square. My friend Terry just emailed me and said, if you cut your own on the bias they would turn out with the edges on the straight of grain.....another good reason for friends! I am just a little slow on the uptake or have you heard of this technique before? Isn't it always the simple things that amaze us? Or maybe it is just me!! Kelly