Chair dolly stacking devices are all made to transport chairs. But not all are made of the same material. So, take a look at the material that is used in the construction of the dolly. Steel is commonly used in the construction of dollies. But here again, not all dollies are alike. The dolly should be sturdy and not wobble when moved from side to side. And you want to make sure that the dolly is large enough to meet your needs, without being so large as to take up more storage space than is necessary. Depending on the type of chair, an average sized dolly will hold up to 28 stacked chairs.