I am knitting a sweater back should measure 30 inches but it measures 33. Gauge is correct. Why is this happening?
If the gauge is correct, then it should work out the same or pretty close. I'm not sure what went wrong. Maybe numbers of sts are miscounted or maybe your sts are looser than the one in the pattern. Any of these could be the causes. If you found none of the above then I would suggest use one less smaller size needle to bring it down a little bit.