Alvin FC88 French Curve Set of 8 popular curves molded of smoke gray-tinted 0.08 inches thick polystyrene with double inking edges; Shipping Dimensions 13 x 4 x 1 inches, 0.50 Lbs; UPC 0-88354-11050-7; Country of Origin: DE.  Conveniently packaged in a 4 color box for individual or classroom use. Heavy enough not to warp but flexible enough not to chip or crack if dropped from a tabletop.