One piece (FOTO 2) is sold multiple mold for making a Puzzle 
size 17.51 "x 11.22" x 1.57 "(450 x 285 x 40 mm) 
To make 1 м² you need 13 pieces. With one mold can produce more than 50 Puzzles for arranging garden paths. 
The mold is made of ABS plastic thickness of 0.078" (1.9-2 мм) It can be used for casting plaster and concrete. Depending on the geometry of the product wall thickness can form less than the above dimensions. 
With this mold you can create original track decor in your yard. It will be quite original and interesting.