This is my first 15 sided biscornu. I stitched it on adia cloth and it was easy to stitch. I love the design as each square is a different pattern. Where I had problems was stuffing it. I could not get it to look right and puff out properly so it looks uneven. I was making it for an exchange but now I will keep it for myself. I will be sticking to making 8 sided ones.
