Relocubes measure 5’10” deep x 6’10” wide x 7’9″ high and carry up to 2,5000 pounds. The website’s FAQ section notes that Relocubes can fit:
One room of items
Any standard-sized mattress
Box springs
Chest of drawers
Dining room sets
Sofas between 83″ and 92″ depending on whether it can be stood on its side