Lifetime 6433 Outdoor Storage Shed with Windows, 11 by 11 Feet Interior Dimensions: 120.5" W x 120.5" L x 79" - 110.25" H Shed includes 2 shatter proof windows that open for increased ventilation and shelving system is customizable and steel reinforced for added strength High arched, steel-reinforced doors offer a 4 foot wide by 6 feet high door opening, lockable doors with internal latching mechanism High-pitched roof support a-frame trusses provide 6 feet 8 inches of head room and the steep roof allows for quick drainage of rain and snow High density polyethylene floor included does not crack, chip or peel; slip resistant surface with beveled edge and is resistant to oil and stains Site selection your shed is recommended to be prepared using a level cement, wood asphalt, gravel or patio style surface for long-term performance Exterior Dimensions: 123.5" W x 123.5" L x 112" H Roof Dimensions: 132.75" W x 132.75" L Interior Dimensions: 120.5" W x 120.5" L x 79" - 110.25" H