So far I have 30 pinwheels done using 5" squares. They were a bit larger so I trimmed the finished squares to 5" planning on maybe a charm square in between. If I put them side by side I lose the pinwheels, all I see is triangles. Any other ideas on placement? Sashing in between? But one thing is for sure they are addicting, I started with the idea of one each day but just can't stop at one!!