This is a classic puzzle, precision cut from 1/4" thick alder wood. It is very interesting in that 4 of the 5 pieces will make a perfect square. Also all 5 of the pieces will make a slightly larger square. It's pretty tricky and somewhat addicting as you set out to do the 5 piece square. It measures 4" x 4" x 1/8" when solved. The puzzle name and instructions are laser cut into one of the pieces. The solution is provided in the package.