How do I figure out how many stitches I need based on someones chest size?
I just finished a tank top for my daughter and a friend asked me to make one for her daughter, but I used the biggest size and Im not sure how many stitches I need to increase the patter by to fit my friends daughter.
I hope that made sense… 
You measure how many stitches per inch you got with your yarn and needles and then multiply that by the number of inches you need to knit.