The Interior Dimensions are 4 1/2 inches wide x 4 inches high x 9 inches long
The Exterior Dimensions are 8 1/2 inches wide x 7 1/2 inches high (to the top of the forge shell) X 9 inches long.
Overall Height is 19 1/2 to the top of the burner.
Forge floor is Dense Ceramic Firebrick, the walls and ceiling are lined with Ceramic Fiber Blanket. Forge comes complete with everything needed to run except a tank of Propane!