eh baby hats become one of those things that are such a quick easy gift that you don't often have to use a pattern for them. not unless you want to do something fancy. i whip out roll brim baby hats whenever i need something to knit and don't have any projects i want to work on (i figure out who gets it later...lol)
The decrease is easy to figure out if you just figure out what number of stitches you have and find a good number to divide it by (9 was an excellent choice in this case). Then you subtract 2 from that number (for your decrease) and have at it. i love the swirly top it makes when you do that.
and if you want a fancy little touch at the top, when you get to the point where there are 3 or 4 stitches left, instead of threading them through, you could do an icord for about 4 inches, bind it off, and then tie it in a knot....voila...umbilical hat!
and since they are babies they will put up with us putting them in whatever ridiculous hat we want to