The altar was made of wood and overlaid with gold. It was two cubits high and its length and width, one cubit squared. The Mishnah indicates that this cubit is a cubit of five handbreadths - the "vessel cubit" (i.e., the measurement used to determine the size of the vessels). 
The Horns of the Incense Altar
Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII