Abstract: An information processing device includes: a formation unit configured to analyze relative positions of dots as measurement markers that expand and contract together with a suit, and form a cluster of the dots; an assignment unit configured to assign numbers to the cluster and the dots; a specification unit configured to acquire the assigned number, set the assigned number to a predetermined coordinate position, and specify a silhouette; and a generation unit configured to generate a three-dimensional (3D) model based on the specified silhouette. The formation unit forms a hexagonal cluster from a dot pattern of the suit, and increases the hexagonal cluster to form a unique honeycomb structure. The assignment unit assigns numbers to the cluster and the dots based on the honeycomb structure. Solid dots and hollow dots are printed as the dots on the whole suit. Thus, a 3D model of a body shape of a user is created with higher accuracy by using a garment for measuring body sizes.