I have sometimes thought I would make something using Clamshells, but thinking is a long way from actually starting. However, I have played with the shape occasionally, just to see if I could come up with something I just had to make.
I like the corners of the wide border in the second design more then the first, but more playtime is required.
Quilter Blogs & Store Search
Virtual Quilter 
I really like your idea. Maybe a Christmas table runner adapting the centre design.
LikeLike
Nola,
Interesting suggestion … thank you.
Judy B
LikeLike