Conveyor Belt Kit

I have a question,
can someone tell me how large or the dimensions of the wooden blocks in the “Conveyor Belt Kit” are length, width, height?
Thanks a lot

P.S. I have namely bought the “Computer Vision Kit” camera, since my expermiemente with the chocolate lenses do not work, I would like to try the whole thing with the wooden blocks, since there are none with the camera I would like to print them with the 3D printer to see if the Visions software there works properly!!!