They are for the bottoms of slippers and socks. I can't wait to make some footed pajamas for my little Kraken!
Treadle only had these two colors, but you can find other colors through a google search. The company on the packaging, Lyle Enterprises, also has a variety for sale.
Has anyone tried these? I read a review just now on Amazon that wasn't very good, but she also was cutting out each little foot and fabric gluing it onto the soles of her projects. That does not seem like the right way to use these footy fabric squares.