why I'm ripping: the gorey details

I just thought I would make it perfectly clear the results of being off a needle size.
the pattern calls for 13sts to 4 inches. I knit about 18sts to 4 inches. Well so what you say..
that means that a sleeve which has say 60 stitches and a body which has 155 (plus 2 in the steek) come up all wrong . The sleeves are 13" in diameter instead of 18" not hte end of hte world..they still go around arms and fit people and stuff, but they woudn't go over a big blouse or turtle neck as comfortably. The body turns up 34" in diameter instead of 48". This is a bigger problem as a 34" chest on a cardigan is about what your average 10 -12 year old girl would wear. This won't work so well on my mother.