I saw these floating around the interwebs and could NOT find a proper pattern in English. So I found a pattern in Finnish and I decided to wing it based on pictures, my feet and basic stitches. This is NOT a finalized pattern, it is being tested and honestly it's a variable pattern....much will depend on your foot size, yarn type, crochet tension, etc.
You can see the original pattern that inspired these here: http://muntekema.blogspot.com/2012/01/ohje-virkatut-tennaritossut.html
I could not get it to translate properly, so this is my best interpretation.
You can download the pattern via Ravelry.
Please feel free to let me know any errata, suggestions, tips, etc! This pattern is meant to be more of a guide and it is understood you have a basic knowledge of crochet terms, patterns, and techniques.
View via Scribd or through this link: http://www.scribd.com/doc/194431129/Chucks-Pattern
Women's Size 6-9 or view via: http://www.scribd.com/doc/194431374/Chucks-Pattern-Womens-6-9
Enjoy! I'd love to see your creations!!