I used this pattern http://www.sugarncream.com/pattern.php?PID=133
The pattern says it takes 3 balls. However, somehow I only used 2 and still have a small bit of yarn left. I think my bag turned out great and wonder if they just over calculated the yarn. I used Lily The Original Sugar ‘n Cream in color Cornflower Blue. I have some of this yarn in Ivory and am thinking about making another bag, not set in stone yet.
Oddly enough, I did get a bit of a blister on my pinky finger while making this bag. This is the first time I have crocheted with Cotton, so maybe that is the reason.