Most shipping containers are slightly smaller than their designated size. This is by design so that smaller containers can stack on the larger containers with a small air gap between them. Different Shipping Container manufacturers use different materials and construction methods so the internal dimensions may vary been containers.
10' Container
Payload - 30,000lbs
Tare Weight - 3,500lbs
cubic capacity - 582 cu.ft
Exterior Dimensions
Length: 10 feet
Width: 8 feet
Height: 8 feet 6 inches
Interior Dimensions (typical)
Length: 9 feet 5 inches
Width: 7 feet 8 inches
Height: 7 feet 9 inches
20' Container
Payload - 48,600lbs
Tare Weight - 5,015lbs
cubic capacity - 1,164 cu.ft
Exterior Dimensions
Length: 20 feet
Width: 8 feet
Height: 8 feet 6 inches
Interior Dimensions (typical)
Length: 19 feet 5 inches
Width: 7 feet 8 inches
Height: 7 feet 9 inches