What are the exact dimensions of the Half Barrel Chronical fermenter?

40" height x 18" width.  

Height is measured from the bottom of the legs to the top of the 1.5" TC ferrule on the top of lid.  

This does NOT include the adjustable feet (that go on the legs which add between 1-2" depending) and does NOT include any blow off fittings or airlocks on the top of the lid.