The dimensions of a stackable washer and dryer varies by model. On the smaller end of the spectrum is the Whirlpool 1.5-cubic-foot washer and 3.4-cubic-foot dryer with dimensions of 71.75 inches in height, 24 inches in width and 27.25 inches in depth.
The dimensions vary depending on the brand and on how many cubic feet of washing and drying space there is in the machine. On the larger side is the GE-brand stackable washer and dryer with 3.3 cubic feet of washing space and 5.9 cubic feet of drying space. The dimensions are 75.5 inches in height, 26.88 inches in width and 30.88 inches in depth.