Hello. I am knitting a cardigan for my daughter. I finished the back, and the size seems to be right. I am now working on one of the front pieces, and it measures 7 inches wide, but the pattern says it should be 7.5. My gauge is right, so I don't understand why there is this discrepancy. Is it possible that the pattern measurement incorrect? I see no other possibility. My question is, should I worry about this? And, if so, what should I do? Thanks.