Four boxes each with a set of 10 cylinders varying in height and/or diameter in each set. Each set is in a separate wooden box with the lid painted the same color as the cylinders - red, green, yellow and blue. This product has cylinders graduated from bigger to smaller in diameter and from shorter to taller in height. Ideal for developing the child's visual discrimination of size. Made of high quality natural wood with non-toxic paints conforming to European toy safety standards.