Pipe is 220mm across and 5mm thick (this can be thinner - whatever you can get). Length is 300mm. Feel free to vary the size for your needs. A shorter double ended forge is more flexible than a longer forge as you can localise the heat. Back is cut from sheet metal. Angle iron for base is 50mm x 75mm. Burner pipe is big enough to put you burner in and cut on an angle.