I think I basically got the size right on this little sweater, for once. It was a remarkably fast knit, which I should remember. It's the Child's Placket Neck Pullover from Last Minute Gifts, knit in Spud and Chloe Sweater, billiard and beluga colors. Because the yarn is a heavier gauge than the pattern, and because I was aiming for the newborn size, I did a little math to adjust the pattern. (Details on Ravelry.)
I like how the stripes turned out but will probably stick to single colors in the future for this sweater. Because the sleeves are shorter than the body, it's hard to get the stripe pattern to match exactly. (To address this, I just knit the sleeves to the body length and rolled the cuff up.) I kept the placket entirely green which also required a little intarsia.
And this sweater has encouraged me to try a little harder to knit children things that fit properly, since it is fun to watch them grow into them but it is probably more fun to see a knit in use right away. Here's hoping that your start of 2013 is full of well-fitting and warm knits!