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1/20 scale bjd means a 9 cm tall doll. This is a model kit, which means you have to make the assembly by yourself, using 0.3mm to 0.5mm steel wire or 0.7mm annealed aluminium wire. Please don't try anything bigeer as it may break the model.
You can refer to these instruction for now : https://www.shapeways.com/forum/index.php?t=msg&goto=86184#msg_86184