I received a sample knit back today, and I really wish the sample knitter had paid some attention to gauge. (It is in the agreement, in bold type.) We're two stitches off on stitch and three and a half off on row. There are no humans made in dimensions that would work with these mittens. Not even close.
Why would you continue knitting when it's obvious that there is something very wrong? That's the time to re-measure gauge. If it's off, rip back and fix it. If it's on and the garment is a distorted shape, do the math. Multiply the gauge times the finished dimensions and see if the stitch counts match. If they're way off, abandon ship! Either re-write the pattern yourself, get someone to help you, or pick a new project. There is no virtue in making a useless garment. And in this case, the sample knitter made not one, but two. Sheesh!