Thats because you're looking at resin dolls.
THis doll is a hujoo baby its only 12 cm! :3
Its also made of ABS plastic rather than resin.
try looking at junkyspot.com! Their obitsu collection and hujoo collection, all though not the MOST gorgeous dolls, are really cute. :3
The smaller dolls are always cheaper, the vinyl dolls are the cheapest material. :3 But they are pretty great quality none the less!