Thanks, guys. Yeah, the original heads were really odd, tiny as you say, and bare too. I first tried adding some helmets or crowns, but I suck at sculpting, so I found these heads in the sprue I got from a forum member here. I am much happier with these.
Another small thing I modified was the ends of the 'dresses'. They were all sharply pointed, so I filed, twisted and bent them a bit to make them more 'finger-friendly' and natural looking (I think at least).