PROBLEM TO BE SOLVED: To provide a mail-order sales system which uses the Internet for ordering a commodity of optimum size from the three-dimensional figure data and also confirming the mounting state of the commodity in a three-dimensional image of computer graphics. SOLUTION: In this mail-order sales system, the three-dimensional figure data measured by a three-dimensional measuring device are previously registered in a server system and reflected on ordering a commodity of optimum size. At the same time, the three-dimensional commodity data are also registered and put on the three-dimensional figure data via the image processing of computer graphics. Then the mounting state of the commodity is displayed on the screen of a member's personal computer.
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