Stackable washers and dryers typically have a depth of 27 inches and a width of 24 or 27 inches. Their heights are less standardized but are generally between 70 and 75 inches.
Although stackable washers and dryers typically fall within a small range of dimensions, their internal dimensions vary as well. Some models may have more interior space than others, even if they are the same size, allowing owners to clean more clothing in single loads. However, it's also important to weigh the efficiency of the unit, as models with thinner walls might radiate away more heat than models with thicker walls, leading to energy loss.