I cannot believe someone could need my largest storage space . It is usually a ten foot by thirty foot space but I occasionally have even larger available, such as a 10x40 foot. A 10x30 foot space can usually hold approximately an entire 3 bedroom apartment with no trouble. Most of the spaces have 8 foot ceilings or taller and can easily hold about six rooms of furniture. A 10x30 foot space is roughly the size of a one and a half car garage. In terms of travel packaging, a ten by thirty foot unit will hold the contents of a 40 foot van very well.