GeoToys 100 Piece Magnetic Puzzle, London 100 pc City Puzzles are jigsaw puzzles of famous cities. The puzzles, which have a magnetic backing, are packaged in small canisters. These fun puzzles can give you a whole new perspective on your favorite cities. Put them together on your table, or on your refrigerator, while you plan your next vacation. Puzzle size 13.4 x 9.3 inches, 100 pieces. Warning: Choking hazard - small parts.