Hello, I am knitting a hat using straight needles and following a pattern. The head I am knitting the hat for is bigger than the largest pattern size, so upon advice from the yarn shop I am using slightly larger needles and following the pattern for the largest size. So instead of 3.25mm needles, I am using 3.75mm for the rim, and instead of 3.75mm, I am using 4.00mm for the main part of the hat. FYI, it's a halfdome hat (skullcap). Anyhoo, I have a few questions...the pattern doesn't always nominate how many rows to knit, but rather states things like "knit until work measures 1.5inches...." so one of my questions is: given that I'm going to be knitting it a little bigger, do I go over a little bit on the measurements? but also, what is the best way to measure - it is in stockinette stitch, so am I best to use the wrong side when measuring? and do I measure from the very first cast on row? and do I measure to the top of the needle (cos isn't that a row of stitches) or to the bottom of the needle? New to knitting so any helpf would be appreciated. Many thanks.