We're they just plain stockinette hats? You don't need to worry about a specific pattern for that.
I don't like seamed hats so here's a few hats in the round that are simple basic hats. When you got to the top you could make a long i-cord tail to tie if you really want that...although it seems like something you'd only want for that one picture.
If you're on Rav -
http://www.ravelry.com/patterns/library/bundle-of-joy-2
http://blueskyalpacas.com/patterns/simple-baby-hat/
https://www.deepsouthfibers.com/uplo...%20Pattern.pdf