I purchased the product and found that the external size of 80 x 80 x 12cm was accurate, fitting well within the minimum internal dimensions of 71 x 71 x 12cm. The approximate capacity of 75 litres was also sufficient for my needs. The drip tray for the STEPHILL SE3000DL with a footprint of 68 x 47.5cm was a useful addition. Being made from recycled polypropylene was a bonus for me as I try to be environmentally conscious.