This Step-a-Truck can be used as a step unit and also as a step truck. It is simple and easy to convert from step to sack truck. When in sack truck mode they are mobile on two 100mm wheels. Measurements for this step-a-truck are as follows: Folded size – 460mm x 70mm x 990mm. Sack Truck Size – 480mm x 490mm x 990mm. Step Unit Size – 470mm x 530mm x 920mm. Platform heigh is 490mm.