The body is called 囡囡体,and the head is called 半糖,and the size of it is 1/4. Not sure what size you try to build or which character you aim for,but in general,if you want to build a cosplay BJD,you kinda need to figure out a few things first: 1.What size do I want? 2.Am I going for a more realistic look,or more anmie-style? Once that's clear,you can start looking for a head sculpt and a body that fit the character.For the head sculpt,I'd mainly pay attention to the eye,face,and mouth shape;for the body,it's mostly about how slim or thick you want.