The letter I chose is the Greek letter SIGMA. In mathematics, it stands for "summation", and also "series."
It's probably obvious that I did this in a hurry, (Fast Friday), and it was fun. The letters in the quilt, all sigmas, are cut from the yellowed pages of my high school calculus book, now an antique. The text on the pages is about summation and series. I used tulle over the paper cutouts to protect them, and I did a little echo quilting. It is about 14" x 16".
Speaking of series, this might be the beginning of a series for me. My next letter would be DELTA, which stands for "change."
Thanks for an interesting challenge!