This is a classic puzzle precision cut from 1/4" thick alder wood. 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. Pretty tricky and somewhat addicting as you set out to do the 5 pc square. MEasures 4" x 4" x 1/8" when solved. Puzzle name and instructions are lasered on one of the pcs. Solution is provided in the package.