The "smallest dimension is 1". So in a 10ft long 2x4 it would be the actual size of a 2x4 (1.5"x3.5"x10'). A standard board foot would be (1"x12"x12"), or any

The "smallest dimension is 1". So in a 10ft long 2x4 it would be the actual size of a 2x4 (1.5"x3.5"x10'). A standard board foot would be (1"x12"x12"), or any other math that makes up the same volume.