66 pieces made of natural wood in a variety of shapes and sizes. The largest block is the Quadruple Unit which measures 51.2cmL x 6.4cmW x 3.2cmH. Each block is based on multiples of the unit block which measures 13cmL x 6.4cmW x 3.2cmH. Blocks are unvarnished, so as to retain their natural 'feel' and antibacterial properties. 3yrs+.

Please note this is a "quarter" set - purchase x2 for a "half" set or x4 for a "full" set.