Rainbow Architect Triangles are beautiful smooth solid beechwood nesting triangles in the seven colours of the rainbow. They have a natural finish to show the grain of the wood with the inner block a solid 3D triangle.Heights: 19mm 40mm 61mm 82mm 103mm 126mm and 148mm. Sides: 29mm 59mm 89mm 119mm 149mm 179mm and 209mm. Lengths: 36mm 79mm 123mm 164mm 207mm 251mm and 292mm. Wall thickness 8mm x width 40mm.Age Suitability: 12 months+