Take a look at this penny sized cork tile- I really like the look and it gets a bunch of points for being recycled from the cork stopper industry’s by-product.
“Cork Mosaic Tile in this 1″ Penny Round style is perfect for walls and floors and even ceilings and is water resistant. So easy to install and seal for a waterproof and insulating flooring or wall covering. Sold by approximately 1 square foot (.92 sq ft per sheet)and comes in double sheets measuring 11.5 x 23(1.84 sq.ft. double sheet) for faster installation.”