Over the course of a few days I figured out a pattern using double crochet throughout and then stitched together braided yarn to look like hair buns. Since I wasn't 100% sure how big the babies head will be, I decided I would make it bigger than for your typical newborn so they had something to grow into versus the hat possibly being too small. I used dimensions from crochetgeek.com for a 3 - 6 month old. Circumference of 14 inches with hat height of 5 1/2 inches.
Sometimes it amazes me how something as simple as attaching 2 faux hair buns to a crochetted hat transforms it from an otherwise boring hat to "omigoodness that's so cute!" kind of hat! :) See! :D
***UPDATE: I truly just like sharing my finished items... but due to popular demand, I've created a listing for this hat for all sizes (please check the dimensions in the listing). I will be offering this hat for a limited time. Feel free to grab more than one ;) Find the hat HERE.