According to the definition given in one classic text: "The ju-i, in olden times, was a scratching-rod of bamboo or wood, carved to resemble a curved finger and up to three feet in length.
古籍《稗文類歸》引《音義指歸》云：「如意者，古之爪杖也。或用竹木削成人指爪，柄長可三尺許。