Grimms medium-sized 6 piece Pastel Tunnel is also known as the "medium" sized tunnel. Approx. measurements Length 17 cm & Width 7 cm. Grimms wood is only sourced from sustainably managed forests in Europe. Trees harvested include alder, lime, beech and maple. All colours and oils, used are certified in accordance with the EN 71 and CPSIA/ASTM 963 standards. They are non-toxic water-based colour stain & non-toxic plant-based oil finish.