Was supposed to be a newborn size, but I am guessing it will more likely fit at six months.
This is what got me going. My friend had something like this for her daughter (a hat with interchangeable flowers) and I thought I'd try and make it.
My first project - a cocoon for newborn photos.
And how could I not make O a hat as well? Also turned out kind of big, as you can see. Pattern from InnerHooker on Etsy.