Quilt by tubakk-quilt, via Flickr. No contact information given. Close inspection of the image (and notes on Flickr) reveal that what I thought was gray is actually denim, from old blue jeans. More subtle than I would have expected from "orange and blue," eg Clemson and Tennessee.
(No pattern) So cute. I see it's a 9-patch. If I were to use 5x5 charms, I'd cut a colored charm into 4 pieces vertically and horizontally to make 4 2.5" blocks. Then take a white square and sew two of the little squares diagonally in 2 corners.