1/3 Kid
Dolls in this size are kid-shaped, but about the same height as a bunch of 1/4 scale adult dolls. Because of this they are often categorized as 1/4, but they're really 1/3--just kid 1/3!
Dolls that can be clothed with patterns in this size are slightly skinnier than resin MSD type dolls (which can wear looser fitting patterns in this size like hoodies and cloaks). Examples of this size are Volks MDD Mini Dollfie Dream and Obitsu's 40cm dolls.