Try this one:
The gauge on the label is an average, not gospel. As you get experience working with any given kind of yarn, you'll know how well it works for you and what it'll look like when you use it. For instance, I like the way Simply Soft looks at about five stitches to the inch, while Super Saver looks best at about four.
We talked about needle size once. For me, that four to the inch will usually take a size 8 needle. Someone on here said she needed a 10 for the same thing, someone else a 7, and another a 6. Everything from your emotional state to physical stuff can alter your gauge. For instance, tonight I'm fighting off a heavy cold and if I tried to knit, everything would be sloppy loose and look like lace. If I were nervous, I'd tend to knit very tightly.