Wow, everyone's looks great!! If the smaller hat seems REALLY small, maybe you should check to see if you're not pulling the yarn that you're carrying in the back a little too tight. I know that a lot of beginning Fair Isle knitters have a bit of a problem with pulling the yarn too tight and it becomes a little puckery (mine is a tiny little bit, but it's not too bad - actually the hat might have been too loose if I had loosened up any of my yarn.) Apparently the trick is to keep the stitches on your right needle (the ones you've already worked for the row) spaced how they will be in the finished piece. Don't stretch them out really far on the right side or that will make the backside too loose and loopy, and don't bunch them up because you will make it too tight and puckery as you weave in the yarn on the WS. I've been told just to not "overthink it", that the natural spacing will help it look the best.
I wasn't aware it can be a big problem on my first hat, so on my second one I'm going to make sure and concentrate on regular, even spacing.