I have a Picco Neemo D. She's small enough to share Kelly Doll clothes. From what I understand the body is the same except for the hands, forearms, calves, and feet between them and the other 14cm Piccos. I have heard of someone putting the Disney Mini Princess dolls on one with no problems, a perfect fit.
http://ecx.images-amazon.com/images/I/5 ... SY300_.jpg These, as well as the Mattel Fairy Mermaid heads. These.
https://timetoplay-img.s3.amazonaws.com ... 00_300.jpgIf your chosen head is somewhere near them then it should work. For a better idea of size wise here is a pic of my Picco Neemo with my Fairyland Puki. They can share dresses. Puki's dresses will be tops on Picco. She has a very slim body.
Heather and Einin by
faydreams, on Flickr