Also try changing whatever you're using as a form. Check Michaels, JoAnns, even WalMart for one of those styrofoam balls or anything nice and round. You want your hat to have to stretch just bit on it so their are no lumps or misshapen spots in the picture. Crochet hats are 99% of what I sell, take a look at some of my photos to get an idea of what I'm talking about.
Also your item descriptions are pretty vague. You may want to include some more information about shipment, turnaround, fiber content, etc.
Also your tags and titles could use a little work. Try incorporating phrases like, "baby girl hat", "crochet baby hat," "crochet photography prop," "newborn baby hat." Use those types of phrases along with one-word descriptors in your tags and incorporate some in your titles.
Good luck!